Enterococcus gallinarum is a bacterial species in the gut microbiota of many creatures, including humans. It has been isolated from various sources, including humans, animals, and the environment. Diseases caused by E. gallinarum have increased in recent years, owing to factors like the widespread application of broad-spectrum antibiotics & the prevalence of invasive medical devices.
According to a 2010 research investigation conducted in Chinese hospitals, E. gallinarum constituted 1.8% of the recovered Enterococcus strains, ranking it third after E. faecalis & E. faecium. It is important to address that E. gallinarum has gotten a lot of attention because of its capacity to acquire resistance to several medicines, which makes treatment difficult.
In a 2004 prevalence investigation at a university hospital in Brazil, Enterococcus gallinarum & Enterococcusflavescens comprised 23.7% & 5.3%, respectively, of the enterococcal isolates recovered from rectal swabs.
In one investigation including 48 individuals, E. gallinarum was responsible for 29 instances (60.4%). Approximately 41.7% of these cases were treated using anti-vancomycin-resistant enterococci (VRE) medications such as linezolid or daptomycin, while 58.3% were cured with anti-enterococcal β-lactam antibiotics. Within 30 days, the overall death rate was 10.4%, while the composite failed therapy rate was 40%.
Enterococcus species, particularly Enterococcus gallinarum, are increasingly causing nosocomial (hospital-acquired) infections. In the US, enterococci grew 11% in 2007 to 14% from 2011 to 2014, accounting for 14% of hospital infection rates. Even though there is a lack of precise information regarding E. gallinarum prevalence among nosocomial infections, it adds to the total burden of enterococcal diseases in healthcare settings.
An agent responsible for causing a portion of instances of community-acquired endocarditis has been identified as Enterococcus gallinarum. An infection of the innermost layer of the heart’s chambers and valves is known as endocarditis. Enterococci, particularly E. gallinarum, are responsible for about 5-20% of infections in cases of community-acquired endocarditis.
Certain variables may lead to a higher incidence of E. gallinarum infection. Potential risk factors include broad-spectrum antibiotic use, invasive medical procedures or devices, extended hospital stays, underlying health issues, a damaged immune system, and exposure to healthcare surroundings.
Kingdom: Bacteria
Phylum:Bacillota
Class: Bacilli
Order: Lactobacillales
Family: Enterococcaceae
Genus:Enterococcus
Species:Enterococcus gallinarum
Enterococcus gallinarum is a gram-positive facultatively anaerobic bacterium with a peptidoglycan-rich cell wall typically found in mammalian intestinal tracts. It usually takes the form of spherical or ovoid-shaped cells.
Size varies from 0.5 to 2.0 μm in length and 0.5 to 1.5 μm in diameter. Peptidoglycan, a mesh-like polymer of sugars & amino acids, makes up the cell wall. The plasma membrane of E. gallinarum works as a selectively permeable barrier. It controls the movement of molecules into and out of the cell.
Flagella, which are long, whip-like appendages needed for movement, may be present in E. gallinarum. They have pili on the cell surface, which are hair-like projections. Pili provides a variety of tasks, including adhesion to host cells and the sharing of genetic material via a process known as conjugation.
Enterococcus gallinarum encompasses various strains, such as EGR748, MRx0518, F87/276, NCDO 2313, and ATCC 49573. Notably, the strain F87/276, which initially comes from the intestines of chickens, is capable of causing infections in humans. This bacterium belongs to a group known as the Lancefield D group and possesses a distinct feature referred to as the VanC phenotype.
This characteristic grants it a unique ability to resist the effects of the antibiotic vancomycin. This resistance is achieved by altering the structure of its peptidoglycan layer, achieved through the action of a specific enzyme encoded by the VanC-1 gene. This change prevents vancomycin from effectively binding and thus renders the bacterium resistant to the antibiotic.
Enterococcus gallinarum also exhibits cytolytic potential facilitated by a toxin called Cytolysin. This toxin comprises two parts, CylL-L and CylL-S, which are produced by the genes cylLL and cylLS, respectively. This toxin can rupture both red and white blood cells in humans, as well as in rabbits and horses. Another enzyme in this bacterium is Gelatinase, encoded by the gelE gene.
This enzyme’s role in breaking down proteins like gelatin and other proteins enhances the ability of the bacteria to invade and spread within the host’s tissues. Additionally, Enterococcus gallinarum possesses an enzyme called Hyaluronidase, encoded by the hylEfm gene, which can break down hyaluronic acid found in the extracellular matrix of the body’s tissues.
Infections with Enterococcus gallinarum are more likely to occur in patients with concomitant hepatobiliary or oncohematological diseases. These circumstances weaken the body’s immunity and provide an environment that supports the bacterium’s growth and dissemination.The bacterium E. gallinarum can proliferate and spread to the body’s weak points.
The production of the toxin cytolysin, which harms host cells and encourages tissue invasion. Adhesins and other surface proteins facilitate the colonization of the host tissue. This amplification and dissemination increase the possibility of spreading diseases to different areas.
The low pH in the stomach is the main deterrent to the invasion of the gut consortium & colonization by orally acquired bacteria, like Enterococcus gallinarum. Most bacteria cannot survive in the stomach’s acidic environment, which serves as a defense against illness.In the pathology of E. gallinarum, the response regulator EtaR is crucial.
Gastric acid sensitivity and pathogenicity are raised and lowered when EtaR is inactive. It implies that undamaged EtaR helps the bacterium survive in the harsh stomach environment and cause infection. According to a 2018 study, E. gallinarum can move to or migrate to other organs such as the lymph nodes, liver, & spleen. In people, this translocation may result in an autoimmune response.
Gut-Associated Lymphoid Tissue (GALT): GALT is a specialized immune system guarding the gastrointestinal tract against pathogens. It consists of structures like Peyer’s patches, isolated lymphoid follicles, intraepithelial lymphocytes, and lamina propria lymphocytes. GALT detects E. gallinarum‘s presence, triggering the release of cytokines, chemokines, and antibodies. This activation rallies other immune cells and curbs bacterial growth.
Innate Lymphoid Cells (ILCs): These lymphocytes don’t possess specific antigen receptors but produce varied cytokines in response to microbial cues. Categorized as ILC1, ILC2, and ILC3s are pivotal for intestinal balance and barrier function. They generate interleukin-17 and interleukin-22, promoting the production of antimicrobial peptides, mucins, and tight junction proteins. ILC3s also help regulate the equilibrium between beneficial and harmful bacteria in the gut.
Phagocytes: Including macrophages, neutrophils, dendritic cells, and monocytes, phagocytes can engulf and neutralize bacteria. They detect E. gallinarum through pattern recognition receptors (PRRs) like toll-like receptors (TLRs) and nucleotide-binding oligomerization domain-like receptors (NLRs). These receptors bind to bacterial components, producing reactive oxygen species, nitric oxide (NO), & pro-inflammatory cytokines like TNF-alpha and IL-1 beta. These substances can either directly eliminate bacteria or attract immune cells to the infection site.
Enterococcus gallinarum can cause intra-abdominal infections like peritonitis and swelling of the peritoneum (abdominal cavity lining). Abdominal pain, soreness, distension, fever, and shifts in bowel habits are all possible symptoms.
Endocarditis, an infection of the heart chambers & valves’ inner lining. Although relatively rare, E. gallinarum has been associated with endocarditis. Symptoms may include fever, fatigue, heart murmur, shortness of breath, chest pain, and signs of systemic infection.
Urinary Tract Infections (UTIs) can be present with symptoms like frequent urination, pain during urination, bloody urine, & lower abdominal discomfort. UTIs can affect both men and women and, if left untreated, have more severe consequences.
Bacteremia, often known as bloodstream infections, can be brought on by E. gallinarum. Fever, chills, fast breathing, quick heartbeat, and generalized weakness are possible symptoms. If bacteremia is not correctly detected and treated, it may result in serious problems.E. gallinarum can also lead to infections at the surgical incision site. Localized discomfort, swelling, redness, discharge, & slow wound healing are a few symptoms that may be present.
Culture method: A suitable medium is streaked or injected with the obtained material. Enterococcus selective media, like bile esculin azide agar or Slanetz-Bartley agar, can help isolate Enterococcus species like E. gallinarum.
E. gallinarum can grow in the presence of high salt concentrations. A selective medium containing 6.5% NaCl (sodium chloride) may thus be used to increase Enterococcus growth while suppressing the development of other bacteria.
Enterococcus gallinarum typically forms small, round, smooth, and grayish-white colonies. The colonies may exhibit a characteristic brownish-black color due to the reaction of esculin with bile salts. The colonies may be further subjected to Gram staining, which shows Gram-positive cocci arranged in pairs or short chains.
Biochemical Tests: To confirm the identification of E. gallinarum, biochemical tests are performed. These tests may include catalase testing (E. gallinarum is catalase-negative), bile resistance testing (E. gallinarum shows resistance to bile at a concentration of 40%), and the ability to grow in 6.5% NaCl broth.
Cerebrospinal fluid (CSF) examination: The differential cell count of the CSF may demonstrate a neutrophil preponderance, signifying an acute inflammatory response to the E. gallinarum infection. White blood cell counts in CSF are often high, reaching 1000 cells per microliter (L). The increase is primarily due to neutrophils, white blood cells involved in the first response to E. gallinarum infections.
PCR method: A human clinical sample was taken, and genome sequencing was performed utilizing an Illumina HiSeq 4000 technology to diagnose E. gallinarum. The complete genome of the E. gallinarum strain was determined to have around 3,730,000 base pairings (bp), having a G + C content of 40.43%.
The de novo assembling of the E. gallinarum genome produced 55 contigs (contiguous DNA sequences) with an N50 value of 208,509 bp. The N50 number denotes the length that prevails when 50% of the genome resides in contigs of the same size or larger, reflecting the assembly’s contiguity and quality.A maximum probability phylogenetic analysis employing 16S rRNA sequencing data was also done.
The 16S rRNA gene is a prominent molecular marker for phylogenetic study and bacterial categorization. This investigation contributes to the understanding of the evolutionary relationships and location of E. gallinarum within the context of other similar bacterial species. Integrating genomic sequencing, de novo assembly, & phylogenetic analysis delivers valuable insights into E. gallinarum‘s genetic features and evolutionary relationships.
Improved surveillance techniques should be implemented to properly monitor the spread and prevalence of Enterococcus gallinarum & Enterococcuscasseliflavus/flavescens at the healthcare facility. It can include frequent cultures, regular infection rate monitoring, & antibiotic resistance pattern tracking.
To reduce the usage of broad-spectrum antibiotics and the development of antibiotic resistance, ensure effective antimicrobial stewardship practices. It includes evaluating Enterococcus isolates for antibiotic susceptibility to determine optimal antibiotic therapy.
Assess the potential requirement for targeted screening & decolonization methods, particularly in high-risk areas or during outbreaks. It can include screening patients at admission or before invasive treatments and instituting decontamination methods as needed.
Enterococcus gallinarum is a bacterial species in the gut microbiota of many creatures, including humans. It has been isolated from various sources, including humans, animals, and the environment. Diseases caused by E. gallinarum have increased in recent years, owing to factors like the widespread application of broad-spectrum antibiotics & the prevalence of invasive medical devices.
According to a 2010 research investigation conducted in Chinese hospitals, E. gallinarum constituted 1.8% of the recovered Enterococcus strains, ranking it third after E. faecalis & E. faecium. It is important to address that E. gallinarum has gotten a lot of attention because of its capacity to acquire resistance to several medicines, which makes treatment difficult.
In a 2004 prevalence investigation at a university hospital in Brazil, Enterococcus gallinarum & Enterococcusflavescens comprised 23.7% & 5.3%, respectively, of the enterococcal isolates recovered from rectal swabs.
In one investigation including 48 individuals, E. gallinarum was responsible for 29 instances (60.4%). Approximately 41.7% of these cases were treated using anti-vancomycin-resistant enterococci (VRE) medications such as linezolid or daptomycin, while 58.3% were cured with anti-enterococcal β-lactam antibiotics. Within 30 days, the overall death rate was 10.4%, while the composite failed therapy rate was 40%.
Enterococcus species, particularly Enterococcus gallinarum, are increasingly causing nosocomial (hospital-acquired) infections. In the US, enterococci grew 11% in 2007 to 14% from 2011 to 2014, accounting for 14% of hospital infection rates. Even though there is a lack of precise information regarding E. gallinarum prevalence among nosocomial infections, it adds to the total burden of enterococcal diseases in healthcare settings.
An agent responsible for causing a portion of instances of community-acquired endocarditis has been identified as Enterococcus gallinarum. An infection of the innermost layer of the heart’s chambers and valves is known as endocarditis. Enterococci, particularly E. gallinarum, are responsible for about 5-20% of infections in cases of community-acquired endocarditis.
Certain variables may lead to a higher incidence of E. gallinarum infection. Potential risk factors include broad-spectrum antibiotic use, invasive medical procedures or devices, extended hospital stays, underlying health issues, a damaged immune system, and exposure to healthcare surroundings.
Kingdom: Bacteria
Phylum:Bacillota
Class: Bacilli
Order: Lactobacillales
Family: Enterococcaceae
Genus:Enterococcus
Species:Enterococcus gallinarum
Enterococcus gallinarum is a gram-positive facultatively anaerobic bacterium with a peptidoglycan-rich cell wall typically found in mammalian intestinal tracts. It usually takes the form of spherical or ovoid-shaped cells.
Size varies from 0.5 to 2.0 μm in length and 0.5 to 1.5 μm in diameter. Peptidoglycan, a mesh-like polymer of sugars & amino acids, makes up the cell wall. The plasma membrane of E. gallinarum works as a selectively permeable barrier. It controls the movement of molecules into and out of the cell.
Flagella, which are long, whip-like appendages needed for movement, may be present in E. gallinarum. They have pili on the cell surface, which are hair-like projections. Pili provides a variety of tasks, including adhesion to host cells and the sharing of genetic material via a process known as conjugation.
Enterococcus gallinarum encompasses various strains, such as EGR748, MRx0518, F87/276, NCDO 2313, and ATCC 49573. Notably, the strain F87/276, which initially comes from the intestines of chickens, is capable of causing infections in humans. This bacterium belongs to a group known as the Lancefield D group and possesses a distinct feature referred to as the VanC phenotype.
This characteristic grants it a unique ability to resist the effects of the antibiotic vancomycin. This resistance is achieved by altering the structure of its peptidoglycan layer, achieved through the action of a specific enzyme encoded by the VanC-1 gene. This change prevents vancomycin from effectively binding and thus renders the bacterium resistant to the antibiotic.
Enterococcus gallinarum also exhibits cytolytic potential facilitated by a toxin called Cytolysin. This toxin comprises two parts, CylL-L and CylL-S, which are produced by the genes cylLL and cylLS, respectively. This toxin can rupture both red and white blood cells in humans, as well as in rabbits and horses. Another enzyme in this bacterium is Gelatinase, encoded by the gelE gene.
This enzyme’s role in breaking down proteins like gelatin and other proteins enhances the ability of the bacteria to invade and spread within the host’s tissues. Additionally, Enterococcus gallinarum possesses an enzyme called Hyaluronidase, encoded by the hylEfm gene, which can break down hyaluronic acid found in the extracellular matrix of the body’s tissues.
Infections with Enterococcus gallinarum are more likely to occur in patients with concomitant hepatobiliary or oncohematological diseases. These circumstances weaken the body’s immunity and provide an environment that supports the bacterium’s growth and dissemination.The bacterium E. gallinarum can proliferate and spread to the body’s weak points.
The production of the toxin cytolysin, which harms host cells and encourages tissue invasion. Adhesins and other surface proteins facilitate the colonization of the host tissue. This amplification and dissemination increase the possibility of spreading diseases to different areas.
The low pH in the stomach is the main deterrent to the invasion of the gut consortium & colonization by orally acquired bacteria, like Enterococcus gallinarum. Most bacteria cannot survive in the stomach’s acidic environment, which serves as a defense against illness.In the pathology of E. gallinarum, the response regulator EtaR is crucial.
Gastric acid sensitivity and pathogenicity are raised and lowered when EtaR is inactive. It implies that undamaged EtaR helps the bacterium survive in the harsh stomach environment and cause infection. According to a 2018 study, E. gallinarum can move to or migrate to other organs such as the lymph nodes, liver, & spleen. In people, this translocation may result in an autoimmune response.
Gut-Associated Lymphoid Tissue (GALT): GALT is a specialized immune system guarding the gastrointestinal tract against pathogens. It consists of structures like Peyer’s patches, isolated lymphoid follicles, intraepithelial lymphocytes, and lamina propria lymphocytes. GALT detects E. gallinarum‘s presence, triggering the release of cytokines, chemokines, and antibodies. This activation rallies other immune cells and curbs bacterial growth.
Innate Lymphoid Cells (ILCs): These lymphocytes don’t possess specific antigen receptors but produce varied cytokines in response to microbial cues. Categorized as ILC1, ILC2, and ILC3s are pivotal for intestinal balance and barrier function. They generate interleukin-17 and interleukin-22, promoting the production of antimicrobial peptides, mucins, and tight junction proteins. ILC3s also help regulate the equilibrium between beneficial and harmful bacteria in the gut.
Phagocytes: Including macrophages, neutrophils, dendritic cells, and monocytes, phagocytes can engulf and neutralize bacteria. They detect E. gallinarum through pattern recognition receptors (PRRs) like toll-like receptors (TLRs) and nucleotide-binding oligomerization domain-like receptors (NLRs). These receptors bind to bacterial components, producing reactive oxygen species, nitric oxide (NO), & pro-inflammatory cytokines like TNF-alpha and IL-1 beta. These substances can either directly eliminate bacteria or attract immune cells to the infection site.
Enterococcus gallinarum can cause intra-abdominal infections like peritonitis and swelling of the peritoneum (abdominal cavity lining). Abdominal pain, soreness, distension, fever, and shifts in bowel habits are all possible symptoms.
Endocarditis, an infection of the heart chambers & valves’ inner lining. Although relatively rare, E. gallinarum has been associated with endocarditis. Symptoms may include fever, fatigue, heart murmur, shortness of breath, chest pain, and signs of systemic infection.
Urinary Tract Infections (UTIs) can be present with symptoms like frequent urination, pain during urination, bloody urine, & lower abdominal discomfort. UTIs can affect both men and women and, if left untreated, have more severe consequences.
Bacteremia, often known as bloodstream infections, can be brought on by E. gallinarum. Fever, chills, fast breathing, quick heartbeat, and generalized weakness are possible symptoms. If bacteremia is not correctly detected and treated, it may result in serious problems.E. gallinarum can also lead to infections at the surgical incision site. Localized discomfort, swelling, redness, discharge, & slow wound healing are a few symptoms that may be present.
Culture method: A suitable medium is streaked or injected with the obtained material. Enterococcus selective media, like bile esculin azide agar or Slanetz-Bartley agar, can help isolate Enterococcus species like E. gallinarum.
E. gallinarum can grow in the presence of high salt concentrations. A selective medium containing 6.5% NaCl (sodium chloride) may thus be used to increase Enterococcus growth while suppressing the development of other bacteria.
Enterococcus gallinarum typically forms small, round, smooth, and grayish-white colonies. The colonies may exhibit a characteristic brownish-black color due to the reaction of esculin with bile salts. The colonies may be further subjected to Gram staining, which shows Gram-positive cocci arranged in pairs or short chains.
Biochemical Tests: To confirm the identification of E. gallinarum, biochemical tests are performed. These tests may include catalase testing (E. gallinarum is catalase-negative), bile resistance testing (E. gallinarum shows resistance to bile at a concentration of 40%), and the ability to grow in 6.5% NaCl broth.
Cerebrospinal fluid (CSF) examination: The differential cell count of the CSF may demonstrate a neutrophil preponderance, signifying an acute inflammatory response to the E. gallinarum infection. White blood cell counts in CSF are often high, reaching 1000 cells per microliter (L). The increase is primarily due to neutrophils, white blood cells involved in the first response to E. gallinarum infections.
PCR method: A human clinical sample was taken, and genome sequencing was performed utilizing an Illumina HiSeq 4000 technology to diagnose E. gallinarum. The complete genome of the E. gallinarum strain was determined to have around 3,730,000 base pairings (bp), having a G + C content of 40.43%.
The de novo assembling of the E. gallinarum genome produced 55 contigs (contiguous DNA sequences) with an N50 value of 208,509 bp. The N50 number denotes the length that prevails when 50% of the genome resides in contigs of the same size or larger, reflecting the assembly’s contiguity and quality.A maximum probability phylogenetic analysis employing 16S rRNA sequencing data was also done.
The 16S rRNA gene is a prominent molecular marker for phylogenetic study and bacterial categorization. This investigation contributes to the understanding of the evolutionary relationships and location of E. gallinarum within the context of other similar bacterial species. Integrating genomic sequencing, de novo assembly, & phylogenetic analysis delivers valuable insights into E. gallinarum‘s genetic features and evolutionary relationships.
Improved surveillance techniques should be implemented to properly monitor the spread and prevalence of Enterococcus gallinarum & Enterococcuscasseliflavus/flavescens at the healthcare facility. It can include frequent cultures, regular infection rate monitoring, & antibiotic resistance pattern tracking.
To reduce the usage of broad-spectrum antibiotics and the development of antibiotic resistance, ensure effective antimicrobial stewardship practices. It includes evaluating Enterococcus isolates for antibiotic susceptibility to determine optimal antibiotic therapy.
Assess the potential requirement for targeted screening & decolonization methods, particularly in high-risk areas or during outbreaks. It can include screening patients at admission or before invasive treatments and instituting decontamination methods as needed.
Enterococcus gallinarum is a bacterial species in the gut microbiota of many creatures, including humans. It has been isolated from various sources, including humans, animals, and the environment. Diseases caused by E. gallinarum have increased in recent years, owing to factors like the widespread application of broad-spectrum antibiotics & the prevalence of invasive medical devices.
According to a 2010 research investigation conducted in Chinese hospitals, E. gallinarum constituted 1.8% of the recovered Enterococcus strains, ranking it third after E. faecalis & E. faecium. It is important to address that E. gallinarum has gotten a lot of attention because of its capacity to acquire resistance to several medicines, which makes treatment difficult.
In a 2004 prevalence investigation at a university hospital in Brazil, Enterococcus gallinarum & Enterococcusflavescens comprised 23.7% & 5.3%, respectively, of the enterococcal isolates recovered from rectal swabs.
In one investigation including 48 individuals, E. gallinarum was responsible for 29 instances (60.4%). Approximately 41.7% of these cases were treated using anti-vancomycin-resistant enterococci (VRE) medications such as linezolid or daptomycin, while 58.3% were cured with anti-enterococcal β-lactam antibiotics. Within 30 days, the overall death rate was 10.4%, while the composite failed therapy rate was 40%.
Enterococcus species, particularly Enterococcus gallinarum, are increasingly causing nosocomial (hospital-acquired) infections. In the US, enterococci grew 11% in 2007 to 14% from 2011 to 2014, accounting for 14% of hospital infection rates. Even though there is a lack of precise information regarding E. gallinarum prevalence among nosocomial infections, it adds to the total burden of enterococcal diseases in healthcare settings.
An agent responsible for causing a portion of instances of community-acquired endocarditis has been identified as Enterococcus gallinarum. An infection of the innermost layer of the heart’s chambers and valves is known as endocarditis. Enterococci, particularly E. gallinarum, are responsible for about 5-20% of infections in cases of community-acquired endocarditis.
Certain variables may lead to a higher incidence of E. gallinarum infection. Potential risk factors include broad-spectrum antibiotic use, invasive medical procedures or devices, extended hospital stays, underlying health issues, a damaged immune system, and exposure to healthcare surroundings.
Kingdom: Bacteria
Phylum:Bacillota
Class: Bacilli
Order: Lactobacillales
Family: Enterococcaceae
Genus:Enterococcus
Species:Enterococcus gallinarum
Enterococcus gallinarum is a gram-positive facultatively anaerobic bacterium with a peptidoglycan-rich cell wall typically found in mammalian intestinal tracts. It usually takes the form of spherical or ovoid-shaped cells.
Size varies from 0.5 to 2.0 μm in length and 0.5 to 1.5 μm in diameter. Peptidoglycan, a mesh-like polymer of sugars & amino acids, makes up the cell wall. The plasma membrane of E. gallinarum works as a selectively permeable barrier. It controls the movement of molecules into and out of the cell.
Flagella, which are long, whip-like appendages needed for movement, may be present in E. gallinarum. They have pili on the cell surface, which are hair-like projections. Pili provides a variety of tasks, including adhesion to host cells and the sharing of genetic material via a process known as conjugation.
Enterococcus gallinarum encompasses various strains, such as EGR748, MRx0518, F87/276, NCDO 2313, and ATCC 49573. Notably, the strain F87/276, which initially comes from the intestines of chickens, is capable of causing infections in humans. This bacterium belongs to a group known as the Lancefield D group and possesses a distinct feature referred to as the VanC phenotype.
This characteristic grants it a unique ability to resist the effects of the antibiotic vancomycin. This resistance is achieved by altering the structure of its peptidoglycan layer, achieved through the action of a specific enzyme encoded by the VanC-1 gene. This change prevents vancomycin from effectively binding and thus renders the bacterium resistant to the antibiotic.
Enterococcus gallinarum also exhibits cytolytic potential facilitated by a toxin called Cytolysin. This toxin comprises two parts, CylL-L and CylL-S, which are produced by the genes cylLL and cylLS, respectively. This toxin can rupture both red and white blood cells in humans, as well as in rabbits and horses. Another enzyme in this bacterium is Gelatinase, encoded by the gelE gene.
This enzyme’s role in breaking down proteins like gelatin and other proteins enhances the ability of the bacteria to invade and spread within the host’s tissues. Additionally, Enterococcus gallinarum possesses an enzyme called Hyaluronidase, encoded by the hylEfm gene, which can break down hyaluronic acid found in the extracellular matrix of the body’s tissues.
Infections with Enterococcus gallinarum are more likely to occur in patients with concomitant hepatobiliary or oncohematological diseases. These circumstances weaken the body’s immunity and provide an environment that supports the bacterium’s growth and dissemination.The bacterium E. gallinarum can proliferate and spread to the body’s weak points.
The production of the toxin cytolysin, which harms host cells and encourages tissue invasion. Adhesins and other surface proteins facilitate the colonization of the host tissue. This amplification and dissemination increase the possibility of spreading diseases to different areas.
The low pH in the stomach is the main deterrent to the invasion of the gut consortium & colonization by orally acquired bacteria, like Enterococcus gallinarum. Most bacteria cannot survive in the stomach’s acidic environment, which serves as a defense against illness.In the pathology of E. gallinarum, the response regulator EtaR is crucial.
Gastric acid sensitivity and pathogenicity are raised and lowered when EtaR is inactive. It implies that undamaged EtaR helps the bacterium survive in the harsh stomach environment and cause infection. According to a 2018 study, E. gallinarum can move to or migrate to other organs such as the lymph nodes, liver, & spleen. In people, this translocation may result in an autoimmune response.
Gut-Associated Lymphoid Tissue (GALT): GALT is a specialized immune system guarding the gastrointestinal tract against pathogens. It consists of structures like Peyer’s patches, isolated lymphoid follicles, intraepithelial lymphocytes, and lamina propria lymphocytes. GALT detects E. gallinarum‘s presence, triggering the release of cytokines, chemokines, and antibodies. This activation rallies other immune cells and curbs bacterial growth.
Innate Lymphoid Cells (ILCs): These lymphocytes don’t possess specific antigen receptors but produce varied cytokines in response to microbial cues. Categorized as ILC1, ILC2, and ILC3s are pivotal for intestinal balance and barrier function. They generate interleukin-17 and interleukin-22, promoting the production of antimicrobial peptides, mucins, and tight junction proteins. ILC3s also help regulate the equilibrium between beneficial and harmful bacteria in the gut.
Phagocytes: Including macrophages, neutrophils, dendritic cells, and monocytes, phagocytes can engulf and neutralize bacteria. They detect E. gallinarum through pattern recognition receptors (PRRs) like toll-like receptors (TLRs) and nucleotide-binding oligomerization domain-like receptors (NLRs). These receptors bind to bacterial components, producing reactive oxygen species, nitric oxide (NO), & pro-inflammatory cytokines like TNF-alpha and IL-1 beta. These substances can either directly eliminate bacteria or attract immune cells to the infection site.
Enterococcus gallinarum can cause intra-abdominal infections like peritonitis and swelling of the peritoneum (abdominal cavity lining). Abdominal pain, soreness, distension, fever, and shifts in bowel habits are all possible symptoms.
Endocarditis, an infection of the heart chambers & valves’ inner lining. Although relatively rare, E. gallinarum has been associated with endocarditis. Symptoms may include fever, fatigue, heart murmur, shortness of breath, chest pain, and signs of systemic infection.
Urinary Tract Infections (UTIs) can be present with symptoms like frequent urination, pain during urination, bloody urine, & lower abdominal discomfort. UTIs can affect both men and women and, if left untreated, have more severe consequences.
Bacteremia, often known as bloodstream infections, can be brought on by E. gallinarum. Fever, chills, fast breathing, quick heartbeat, and generalized weakness are possible symptoms. If bacteremia is not correctly detected and treated, it may result in serious problems.E. gallinarum can also lead to infections at the surgical incision site. Localized discomfort, swelling, redness, discharge, & slow wound healing are a few symptoms that may be present.
Culture method: A suitable medium is streaked or injected with the obtained material. Enterococcus selective media, like bile esculin azide agar or Slanetz-Bartley agar, can help isolate Enterococcus species like E. gallinarum.
E. gallinarum can grow in the presence of high salt concentrations. A selective medium containing 6.5% NaCl (sodium chloride) may thus be used to increase Enterococcus growth while suppressing the development of other bacteria.
Enterococcus gallinarum typically forms small, round, smooth, and grayish-white colonies. The colonies may exhibit a characteristic brownish-black color due to the reaction of esculin with bile salts. The colonies may be further subjected to Gram staining, which shows Gram-positive cocci arranged in pairs or short chains.
Biochemical Tests: To confirm the identification of E. gallinarum, biochemical tests are performed. These tests may include catalase testing (E. gallinarum is catalase-negative), bile resistance testing (E. gallinarum shows resistance to bile at a concentration of 40%), and the ability to grow in 6.5% NaCl broth.
Cerebrospinal fluid (CSF) examination: The differential cell count of the CSF may demonstrate a neutrophil preponderance, signifying an acute inflammatory response to the E. gallinarum infection. White blood cell counts in CSF are often high, reaching 1000 cells per microliter (L). The increase is primarily due to neutrophils, white blood cells involved in the first response to E. gallinarum infections.
PCR method: A human clinical sample was taken, and genome sequencing was performed utilizing an Illumina HiSeq 4000 technology to diagnose E. gallinarum. The complete genome of the E. gallinarum strain was determined to have around 3,730,000 base pairings (bp), having a G + C content of 40.43%.
The de novo assembling of the E. gallinarum genome produced 55 contigs (contiguous DNA sequences) with an N50 value of 208,509 bp. The N50 number denotes the length that prevails when 50% of the genome resides in contigs of the same size or larger, reflecting the assembly’s contiguity and quality.A maximum probability phylogenetic analysis employing 16S rRNA sequencing data was also done.
The 16S rRNA gene is a prominent molecular marker for phylogenetic study and bacterial categorization. This investigation contributes to the understanding of the evolutionary relationships and location of E. gallinarum within the context of other similar bacterial species. Integrating genomic sequencing, de novo assembly, & phylogenetic analysis delivers valuable insights into E. gallinarum‘s genetic features and evolutionary relationships.
Improved surveillance techniques should be implemented to properly monitor the spread and prevalence of Enterococcus gallinarum & Enterococcuscasseliflavus/flavescens at the healthcare facility. It can include frequent cultures, regular infection rate monitoring, & antibiotic resistance pattern tracking.
To reduce the usage of broad-spectrum antibiotics and the development of antibiotic resistance, ensure effective antimicrobial stewardship practices. It includes evaluating Enterococcus isolates for antibiotic susceptibility to determine optimal antibiotic therapy.
Assess the potential requirement for targeted screening & decolonization methods, particularly in high-risk areas or during outbreaks. It can include screening patients at admission or before invasive treatments and instituting decontamination methods as needed.
Both our subscription plans include Free CME/CPD AMA PRA Category 1 credits.
Digital Certificate PDF
On course completion, you will receive a full-sized presentation quality digital certificate.
medtigo Simulation
A dynamic medical simulation platform designed to train healthcare professionals and students to effectively run code situations through an immersive hands-on experience in a live, interactive 3D environment.
medtigo Points
medtigo points is our unique point redemption system created to award users for interacting on our site. These points can be redeemed for special discounts on the medtigo marketplace as well as towards the membership cost itself.
Community Forum post/reply = 5 points
*Redemption of points can occur only through the medtigo marketplace, courses, or simulation system. Money will not be credited to your bank account. 10 points = $1.
All Your Certificates in One Place
When you have your licenses, certificates and CMEs in one place, it's easier to track your career growth. You can easily share these with hospitals as well, using your medtigo app.
