Full text full text is available as a scanned copy of the original print version. It exhibits a remarkable adaptive capability and easily acquires resistance to. Enterobacter aerogenes is often spread by crosscontamination from surgery or consistant treatment in hospitals for patients who use catheters. After doing the procedure involving crystal violet, iodine, alcohol, and safranin, and viewing the slide under the microscope, purple rods were seen. Enterobacter aerogenes produces most of the same set of fermentation products, as well as large amounts of 2,3butylene glycol, which is nonacidic and permits more bacterial growth. Enterobacter aerogenes enterobacter aerogenes is a gramnegative, oxidase negative, catalase positive, rodshaped, nosocomial and pathogenic bacterium that causes opportunistic infections in skin and other tissues. Enterobacter species infectious disease and antimicrobial. These characteristics, associated with the frequent endogenous intestinal carriage of e. Gramnegative, capsulated, gasproducing rods found widely in nature. The vogesproskauer test demonstrated a positive result indicating that enterobacter aerogenes was the unknown bacterium. Bartoloni, in encyclopedia of food sciences and nutrition second edition, 2003.
Enterobacter aerogenes is a gramnegative, oxidase negative, catalase positive, rodshaped bacterium. Below is a further simple test we can do to differentiate e. Some strains can become very treatment resistant, a result of their colonization within hospital environments. Aerogenesis definition of aerogenesis by medical dictionary. Links to pubmed are also available for selected references. Enterobacter are gramnegative bacteria and are classified as facultative anaerobes. The characteristics of enterobacter aerogenes, a type of. Enterobacter aerogenes how to identify for micro unknown. Treatment is dependent on local trends of antibiotic resistance. Colonial morphology differs greatly among enterobacter spp. The test consists of inoculating a pure bacterial suspension into the test wells and reading the color reactions that. The nitrate test was not necessary, but gave the positive result that would be expected. Enterobacter aerogenes is part of normal flora can be infective.
Enterobacter aerogenes wikipedia, a enciclopedia livre. Mic gml results and interpretation drug mic int drug mic int amikacin. Enterobacter aerogenes strain atcc 48 is a bacteria that could have number of consumer, commercial and industrial uses. Get a printable copy pdf file of the complete article 785k, or click on a page image below to browse page by page. Enterobacter are ubiquitous, and, in humans, multiple species are opportunistic pathogens. Enterobacter cloacae is the most frequently isolated enterobacter species from humans and animals.
The culture collections represent deposits of cultures from worldwide sources. Microbiology legend cycle 43 organism 5 enterobacter aerogenes. Free essays on classification of enterobacter aerogenes. The clinical isolates were initially identified as e. This name appeared on the approved lists of bacterial names 1980. They first achieved wide notoriety as pathogens in 1976 following a nationwide outbreak of septicemia in 378 patients at 25 hospitals resulting from contaminated. It has been found to live in various wastes, hygienic chemicals, and soil.
Indol, methyl red, hydrogen sulfide by way of tsi, urease, arginine dihydrolase, phenylalanine deaminase, and dulcitol. Enterobacter aerogenes flashcards and study sets quizlet. It rarely infects healthy people enterobacter aerogenes is part of normal flora can be infective. Enterobacter aerogenes a bacterial species found in water, soil, sewage, dairy products, and the feces of humans and other animals. The first procedure carried out was the isolation of the unknown mixtures by carrying out the quadrant steak procedure on an agar medium. Enterobacter aerogenes, part of the enterobacteriaceae family, is a rodshaped bacteria that causes bacterial infections, and is usually acquired in a hospital or hospitaltype atmospheres.
Transmission of enterobacter aerogenes septicemia in. Treatment enterobacter aerogenes characteristics of e. Cette famille comprend e coli, salmonella, shigella et klebsiella. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. From 2006 to 2009, between two and seven isolates were found per year. Enterobacter aerogenes primarily causes nosocomial infections, being passed from one compromised patient to another. Then it was incubated at 37 degree celsius for 2 days, the result obtained was colonies grown of one kind only, when gram stained found out to be pink color rod shaped microbes, this proofed that it was a. This report describes two unusual cases of septicemia caused by e. How to identify enterobacter aerogenes microbiology. Enterobacter aerogenes is a common agent of hospitalacquired infection. Enterobacter species are motile aerobic gram negative bacilli belonging to the family enterobacteriaceae. Enterobacter aerogenes, also known as aerobacter aerogenes, is a member of the enterobacteriaceae family.
Enterobacter aerogenes and enterobacter cloacae are gramnegative bacteria that belong to the family enterobacteriaceae. Find details on enterobacter aerogenes aerobacter aerogenes in dogs including diagnosis and symptoms, active forms, resting forms, clinical effects, treatment and more. Enterobacter aerogenes an overview sciencedirect topics. Outbreak of nosocomial bacteremias, caused by enterobacter. Hosted by the usgs core science analytics and synthesis. One of the two aerogenes can use citrate, a four carbon molecule, as an energy source while the other cannot. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties.
Klebsiella pneumoniae is a gramnegative, nonmotile, encapsulated rod shaped bacterium found in the normal flora of the mouth, skin, and intestines. Enterobacter aerogenes other names i aerobacter aerogenes hormaeche and edwards 1958 atcc 48 aerobacter aerogenes aerobacter aerogenes. In this casecontrol study we describe epidemiological characteristics and evaluate risk factors for bacteremias caused by a rare human pathogen enterobacter gergoviae, and enterobacter aerogenes, among neonates in the intensive care unit, under conditions of nosocomial outbreak. Under the microscope, enterobacter is rodshaped with rounded ends. Klebsiella aerogenes, previously known as enterobacter aerogenes, is a gramnegative, oxidase negative, catalase positive, citrate positive, indole negative, rodshaped bacterium.
Identifying enterobacter aerogenes from a mixed culture of. Enterobacter aerogenes is a gramnegative, oxidase negative, catalase positive, rodshaped. Pathogenic enterobacter can cause any of a variety of conditions. Unknown lab report, microbiology enterobacter aerogenes. Enterobacter aerogenes is a universal bacterium in the environment isolated naturally in soli, fresh water, vegetables, plants, dairy products, cosmetics, and human and animal feces. Enterobacter aerogenes hormaeche and edwards 1960 approved. The causative agent of human shigellosis, shigella causes. Enterobacter, any of a group of rodshaped bacteria of the family enterobacteriaceae. Identifying enterobacter aerogenes from a mixed culture of unknown gram positive and gram negative bacteria kevin le november, 20 purpose the focus of this study is to be able to identify an unknown bacterium, specifically a gram negative one. Klebsiella mobilis enterobacter aerogenes enterobakter arojenez a. Characteristics enterobacter aerogenes is a gramnegative stains pink with the gram stain bacteria. Pathogenic enterobacter can cause any of a variety of conditions, including eye and skin infections.
Shigella is gramnegative, nonmotile, nonspore forming, rodshaped bacteria closely related to escherichia coli and salmonella. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Jul 01, 2014 this also confirmed that the unknown bacterium was enterobacter aerogenes. Enterobacter aerogenes definition of enterobacter aerogenes. While every effort is made to ensure details distributed by culture collections are accurate, culture collections cannot be held responsible for any inaccuracies in the data supplied. The schema brings easy and highly discriminatory detection of subtype or outbreakspecific markers from whole genome sequencing data to your fingertips.
The species enterobacter aerogenes was originally described by hormaeche and edwards 1960. Enterobacter description, characteristics, species. Enterobacter infections do not produce a unique enough clinical presentation to differentiate them clinically from other acute bacterial infections. Its role as an enteric pathogen has not been demonstrated. Enterobacter aerogenes identifying bacteria may seem like a daunting task, but if approached slowly and methodically it can be achieved. It usually causes opportunistic infections, meaning that it will usually only cause a disease in a person or host that has a compromised immune system. In total, 33 isolates 28 enterobacter cloacae and 5 enterobacter aerogenes were collected during the study period. Jun 18, 2019 enterobacter infections can include bacteremia, lower respiratory tract infections, skin and softtissue infections, urinary tract infections utis, endocarditis, intraabdominal infections, septic arthritis, osteomyelitis, cns infections, and ophthalmic infections. As an opportunistic pathogen it may infect immunocompromised patients in the urinary and respiratory tracts. They are the cause of various nosocomial infections in immunocompromised patients. How to identify enterobacter aerogenes api 20e sciencing. Enterobacter aerogenes is an agent of hospitalacquired infection that exhibits a remarkable resistance to. Enterobacter huaxiensis and enterobacter chuandaensis are two recently. Enterobacter aerogenes and enterobacter cloacae cause wound munez et al 2012, respiratory wang et al 2012.
This also confirmed that the unknown bacterium was enterobacter aerogenes. Klebsiella aerogenes formerly known as enterobacter aerogenes in bionumerics. It is a gramnegative rod shaped bacteria that is increasingly more resistant to antibiotics. One of the two aerogenes can use citrate, a four carbon molecule, as an. Enterobacter aerogenes strain atcc 48 has characteristics in common with strains of the species enterobacter aerogenes and is found in nature. Robbins microbiology lab was to identify a randomly chosen bacterium. Pdf enterobacter aerogenes and enterobacter cloacae. Enterobacter aerogenes and other species of enterobacteriaceae are easy to identify using the api20e test kit. Enterobacter infections can necessitate prolonged hospitalization, multiple. All enterobacter species are found in water, sewage, soil, and vegetables. Enterobacter aerogenes is recognized as an important bacterial pathogen in hospitalacquired infections. Enterobacter aerogenes is nosocomial, meaning it is contracted by treatment in a hospital and that healthy people are typically not at risk for infection. Glaeser enterobacter aerogenes and enterococcus faecalis introduction. Successive emergence of enterobacter aerogenes strains.
Consequently, details on the patient history and physical examination findings for each infected body compartment are not provided in this article, with the exception of lower respiratory tract infections and bacteremia. Final screening assessment for enterobacter aerogenes strain. Enterobacter infections can include bacteremia, lower respiratory tract infections, skin and softtissue infections, urinary tract infections utis, endocarditis, intraabdominal infections, septic arthritis, osteomyelitis, cns infections, and ophthalmic infections. Enterobacter naturally inhabit the human intestinal tract, soil, water, animals, plants and are common in foods. Choose from 7 different sets of enterobacter aerogenes flashcards on quizlet. Enterobacter aerogenes aerobacter aerogenes in dogs. Apr 22, 2011 enterobacter aerogenes has been plated on several different medias and have been observed under several types of testing.
The twenty strains of gramnegative bacteria tested in this study were mdr isolates laboratory collection and reference strains american type culture collection of escherichia coli atcc8739, ag100a, ag100atet, ag102, mc4100, and w3110, enterobacter aerogenes atcc48, cm64, ea27, ea289, and ea294, klebsiella pneumoniae atcc11296, kp55, kp63, and k24, pseudomonas aeruginosa pa01 and. Enterobacter aerogenes, living, nutrient broth, tube. Facultative anaerobic colonies are large 23 mm, gray, smooth, shiny and sometimes flat with irregular edges, they can also be mucoid strains with kantigen have a capsule they are nonpigmented. Bacteria identification were performed by matrixassisted. However, it is not a legal authority for statutory or regulatory purposes. The bacterium is approximately microns in length, and is capable of motility via peritrichous flagella.
The experiment was centered on metabolic and biochemical testing procedures. Fast and actionable organism identification provides clinicians with valuable diagnostic. In general, the strains from environmental sources grow better at 2030 degrees c. It is oxidasenegative, indolenegative, and ureasevariable. Organisms previously identified as motile strains of aerobacter aerogenes are now placed in this species. It is important to identify bacteria and differentiate pathogenic and nonpathogenic organisms. Enterobacter aerogenes is a hospitalacquired and pathogenic bacterium that causes infections. This family includes e coli, salmonella, shigella and klebsiella.
Mcconkey growth, lactose fermenter bbao growth characteristics. Pdf outbreak of enterobacter aerogenes septicemia in. Learn enterobacter aerogenes with free interactive flashcards. How to identify enterobacter aerogenes microbiology unknown.