Epidemiology
The epidemiology of Enterococcus avium is the study of the distribution and determinants of the infection caused by this bacterium in human and animal populations. Enterococcus avium is a gram-positive, facultatively anaerobic coccus mostly found in birds but can also be transmitted through food products such as poultry meat, eggs, cheese, and honey. Enterococcus avium can cause various infections in humans and animals, such as brain abscesses, endocarditis, bacteremia, urinary tract infections, wound infections, and peritonitis.
Enterococcus avium is a rare and opportunistic pathogen that usually affects immunocompromised or debilitated patients with underlying diseases or conditions, such as diabetes mellitus, malignancy, renal failure, liver cirrhosis, or previous surgery. The incidence and prevalence of Enterococcus avium infection are not well known, but some studies have reported that it accounts for less than 1% of all enterococcal isolates from clinical specimens. The mortality rate of Enterococcus avium infection needs to be better established. Still, it may range from 20% to 50%, depending on the site and severity of the infection and comorbidities.
Nosocomial enterococcal bacteremia in Taiwan: incidence, features of the disease, and prognosis. The study found that the incidence of enterococcal bacteremia was 3.9 per 10,000 admissions and that Enterococcus faecium was the predominant species (74%), followed by Enterococcus faecalis (20%). Enterococcus avium accounted for only 0.6% of the cases. The mortality rate of enterococcal bacteremia was 28%, and the risk factors for mortality were older age, malignancy, septic shock, polymicrobial infection, and inappropriate empirical therapy.
Classification and Structure
Enterococcus avium is a Gram-positive bacterium that retains the crystal violet stain in the Gram-staining process. It is spherical or oval and typically arranged in pairs or short chains. As a member of the Enterococcus genus, it shares certain characteristic features with other enterococci, such as the ability to grow in the presence of 6.5% NaCl and inactive catalase are present.
Enterococcus avium, like other enterococci, possesses a cell wall containing peptidoglycan, which provides structural support to the bacterium. The cell wall is a vital target for some antibiotics. It also has a cytoplasmic membrane, cytoplasm, and genetic material (DNA) responsible for its metabolic functions and replication.
This bacterium is facultatively anaerobic, which can survive in both oxygenated and oxygen-limited environments. Additionally, Enterococcus avium is known for its resistance to multiple antibiotics, making it a concern in clinical settings, as it can be involved in healthcare-associated infections.
Antigenic Types
There is no information about the antigenic types of Enterococcus avium. However, Enterococcus avium is a species of Enterococcus mainly found in birds. Rarely is it also a cause of infection in humans, and in such cases, it may be vancomycin-resistant and is referred to as VREA. Linezolid has been used to treat VREA instances in people.
The genome of Enterococcus avium includes a round chromosome and a plasmid. The chromosome is about 4.8 Mb in size and has a 39% or so of the GC. The plasmid includes 99 protein-coding sequences and is around 88 kb in size. The bile adaptation genes bsh, sbcC, mutS, nifI, galU, & hupB are among those found in the genome. Additionally, it has genes related to virulence, including esp, fss1, fss3, bsh, ecbA, lap, clpC, clpE, & clpP.
The type of strain of Enterococcus avium is ATCC 14025. It has been deposited in several culture collections worldwide, including CCUG, CIP, DSM, JCM, BCCM/LMG, NBRC, NCDO, NCIMB, NCTC, VKM, and personal. The strain type was isolated from chicken feces in 1967 by Nowlan and Deibel.
Pathogenesis
The pathogenesis of Enterococcus avium is not well understood, but some studies have suggested that it may involve several factors, such as:
Host Defenses
The host defenses of Enterococcus avium are the human or animal immune system’s mechanisms to fight against the infection caused by this bacterium. Some of the host defenses that are involved in this process are:
Clinical manifestations
Enterococcus avium is a species of bacteria that is mainly found in birds. It is a rare cause of infection in humans, and it may be resistant to vancomycin, a common antibiotic. This type of infection is called VREA, which stands for vancomycin-resistant Enterococcus avium.
Some of the clinical manifestations of Enterococcus avium infection are:
Diagnosis
These diagnostic approaches play a crucial role in identifying the presence of the bacterium and determining the appropriate treatment. Let’s recap the methods briefly:
Control
Prevention of Enterococcus avium infection:
Epidemiology
The epidemiology of Enterococcus avium is the study of the distribution and determinants of the infection caused by this bacterium in human and animal populations. Enterococcus avium is a gram-positive, facultatively anaerobic coccus mostly found in birds but can also be transmitted through food products such as poultry meat, eggs, cheese, and honey. Enterococcus avium can cause various infections in humans and animals, such as brain abscesses, endocarditis, bacteremia, urinary tract infections, wound infections, and peritonitis.
Enterococcus avium is a rare and opportunistic pathogen that usually affects immunocompromised or debilitated patients with underlying diseases or conditions, such as diabetes mellitus, malignancy, renal failure, liver cirrhosis, or previous surgery. The incidence and prevalence of Enterococcus avium infection are not well known, but some studies have reported that it accounts for less than 1% of all enterococcal isolates from clinical specimens. The mortality rate of Enterococcus avium infection needs to be better established. Still, it may range from 20% to 50%, depending on the site and severity of the infection and comorbidities.
Nosocomial enterococcal bacteremia in Taiwan: incidence, features of the disease, and prognosis. The study found that the incidence of enterococcal bacteremia was 3.9 per 10,000 admissions and that Enterococcus faecium was the predominant species (74%), followed by Enterococcus faecalis (20%). Enterococcus avium accounted for only 0.6% of the cases. The mortality rate of enterococcal bacteremia was 28%, and the risk factors for mortality were older age, malignancy, septic shock, polymicrobial infection, and inappropriate empirical therapy.
Classification and Structure
Enterococcus avium is a Gram-positive bacterium that retains the crystal violet stain in the Gram-staining process. It is spherical or oval and typically arranged in pairs or short chains. As a member of the Enterococcus genus, it shares certain characteristic features with other enterococci, such as the ability to grow in the presence of 6.5% NaCl and inactive catalase are present.
Enterococcus avium, like other enterococci, possesses a cell wall containing peptidoglycan, which provides structural support to the bacterium. The cell wall is a vital target for some antibiotics. It also has a cytoplasmic membrane, cytoplasm, and genetic material (DNA) responsible for its metabolic functions and replication.
This bacterium is facultatively anaerobic, which can survive in both oxygenated and oxygen-limited environments. Additionally, Enterococcus avium is known for its resistance to multiple antibiotics, making it a concern in clinical settings, as it can be involved in healthcare-associated infections.
Antigenic Types
There is no information about the antigenic types of Enterococcus avium. However, Enterococcus avium is a species of Enterococcus mainly found in birds. Rarely is it also a cause of infection in humans, and in such cases, it may be vancomycin-resistant and is referred to as VREA. Linezolid has been used to treat VREA instances in people.
The genome of Enterococcus avium includes a round chromosome and a plasmid. The chromosome is about 4.8 Mb in size and has a 39% or so of the GC. The plasmid includes 99 protein-coding sequences and is around 88 kb in size. The bile adaptation genes bsh, sbcC, mutS, nifI, galU, & hupB are among those found in the genome. Additionally, it has genes related to virulence, including esp, fss1, fss3, bsh, ecbA, lap, clpC, clpE, & clpP.
The type of strain of Enterococcus avium is ATCC 14025. It has been deposited in several culture collections worldwide, including CCUG, CIP, DSM, JCM, BCCM/LMG, NBRC, NCDO, NCIMB, NCTC, VKM, and personal. The strain type was isolated from chicken feces in 1967 by Nowlan and Deibel.
Pathogenesis
The pathogenesis of Enterococcus avium is not well understood, but some studies have suggested that it may involve several factors, such as:
Host Defenses
The host defenses of Enterococcus avium are the human or animal immune system’s mechanisms to fight against the infection caused by this bacterium. Some of the host defenses that are involved in this process are:
Clinical manifestations
Enterococcus avium is a species of bacteria that is mainly found in birds. It is a rare cause of infection in humans, and it may be resistant to vancomycin, a common antibiotic. This type of infection is called VREA, which stands for vancomycin-resistant Enterococcus avium.
Some of the clinical manifestations of Enterococcus avium infection are:
Diagnosis
These diagnostic approaches play a crucial role in identifying the presence of the bacterium and determining the appropriate treatment. Let’s recap the methods briefly:
Control
Prevention of Enterococcus avium infection:
Epidemiology
The epidemiology of Enterococcus avium is the study of the distribution and determinants of the infection caused by this bacterium in human and animal populations. Enterococcus avium is a gram-positive, facultatively anaerobic coccus mostly found in birds but can also be transmitted through food products such as poultry meat, eggs, cheese, and honey. Enterococcus avium can cause various infections in humans and animals, such as brain abscesses, endocarditis, bacteremia, urinary tract infections, wound infections, and peritonitis.
Enterococcus avium is a rare and opportunistic pathogen that usually affects immunocompromised or debilitated patients with underlying diseases or conditions, such as diabetes mellitus, malignancy, renal failure, liver cirrhosis, or previous surgery. The incidence and prevalence of Enterococcus avium infection are not well known, but some studies have reported that it accounts for less than 1% of all enterococcal isolates from clinical specimens. The mortality rate of Enterococcus avium infection needs to be better established. Still, it may range from 20% to 50%, depending on the site and severity of the infection and comorbidities.
Nosocomial enterococcal bacteremia in Taiwan: incidence, features of the disease, and prognosis. The study found that the incidence of enterococcal bacteremia was 3.9 per 10,000 admissions and that Enterococcus faecium was the predominant species (74%), followed by Enterococcus faecalis (20%). Enterococcus avium accounted for only 0.6% of the cases. The mortality rate of enterococcal bacteremia was 28%, and the risk factors for mortality were older age, malignancy, septic shock, polymicrobial infection, and inappropriate empirical therapy.
Classification and Structure
Enterococcus avium is a Gram-positive bacterium that retains the crystal violet stain in the Gram-staining process. It is spherical or oval and typically arranged in pairs or short chains. As a member of the Enterococcus genus, it shares certain characteristic features with other enterococci, such as the ability to grow in the presence of 6.5% NaCl and inactive catalase are present.
Enterococcus avium, like other enterococci, possesses a cell wall containing peptidoglycan, which provides structural support to the bacterium. The cell wall is a vital target for some antibiotics. It also has a cytoplasmic membrane, cytoplasm, and genetic material (DNA) responsible for its metabolic functions and replication.
This bacterium is facultatively anaerobic, which can survive in both oxygenated and oxygen-limited environments. Additionally, Enterococcus avium is known for its resistance to multiple antibiotics, making it a concern in clinical settings, as it can be involved in healthcare-associated infections.
Antigenic Types
There is no information about the antigenic types of Enterococcus avium. However, Enterococcus avium is a species of Enterococcus mainly found in birds. Rarely is it also a cause of infection in humans, and in such cases, it may be vancomycin-resistant and is referred to as VREA. Linezolid has been used to treat VREA instances in people.
The genome of Enterococcus avium includes a round chromosome and a plasmid. The chromosome is about 4.8 Mb in size and has a 39% or so of the GC. The plasmid includes 99 protein-coding sequences and is around 88 kb in size. The bile adaptation genes bsh, sbcC, mutS, nifI, galU, & hupB are among those found in the genome. Additionally, it has genes related to virulence, including esp, fss1, fss3, bsh, ecbA, lap, clpC, clpE, & clpP.
The type of strain of Enterococcus avium is ATCC 14025. It has been deposited in several culture collections worldwide, including CCUG, CIP, DSM, JCM, BCCM/LMG, NBRC, NCDO, NCIMB, NCTC, VKM, and personal. The strain type was isolated from chicken feces in 1967 by Nowlan and Deibel.
Pathogenesis
The pathogenesis of Enterococcus avium is not well understood, but some studies have suggested that it may involve several factors, such as:
Host Defenses
The host defenses of Enterococcus avium are the human or animal immune system’s mechanisms to fight against the infection caused by this bacterium. Some of the host defenses that are involved in this process are:
Clinical manifestations
Enterococcus avium is a species of bacteria that is mainly found in birds. It is a rare cause of infection in humans, and it may be resistant to vancomycin, a common antibiotic. This type of infection is called VREA, which stands for vancomycin-resistant Enterococcus avium.
Some of the clinical manifestations of Enterococcus avium infection are:
Diagnosis
These diagnostic approaches play a crucial role in identifying the presence of the bacterium and determining the appropriate treatment. Let’s recap the methods briefly:
Control
Prevention of Enterococcus avium infection:

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