Is Pseudomonas aeruginosa an enteric bacteria?
Pseudomonas aeruginosa is not a common enteric pathogen in healthy hosts. Shanghai fever is a sepsis accompanied by enteric disease caused by P aeruginosa. Hypogammaglobulinaemia is the most common underlying primary immune deficiency in previously healthy children with P aeruginosa sepsis.
What disease does chromobacterium Violaceum cause?
Chromobacterium violaceum is associated with a spectrum of disease from localized skin and soft tissue infection (SSTI) to systemic or invasive infection including necrotizing fasciitis,13 visceral abscesses, osteomyelitis, and central nervous system disease.
Does Pseudomonas aeruginosa ferment lactose?
P. aeruginosa has few nutritional requirements and can adapt to conditions not tolerated by other organisms. It does not ferment lactose or other carbohydrates but oxidizes glucose and xylose.
What disease does Hafnia alvei cause?
Hafnia alvei is a gram-negative bacterium that is rarely isolated from human specimens and is rarely considered to be pathogenic. It has been associated with gastroenteritis, meningitis, bacteremia, pneumonia, nosocomial wound infections, endophthalmitis, and a buttock abscess.
Does Pseudomonas aeruginosa grow on blood agar?
In the laboratory, the simplest medium for growth of Pseudomonas aeruginosa consists of acetate as a source of carbon and ammonium sulfate as a source of nitrogen. Pseudomonas aeruginosa on Blood Agar (typical metallic sheen). P. aeruginosa isolates may produce three colony types.
How do you identify Chromobacterium violaceum?
Identification of Chromobacterium violaceum has been based largely upon its unique violet pigmentation. In most laboratories tests such as Gram’s staining, motility and some biochemical reactions were also done before conclusive identification was made: Pigmented strains of C.
Is Chromobacterium violaceum pathogenic?
Chromobacterium violaceum is a rare opportunistic human pathogen but can cause life-threatening sepsis with metastatic abscesses. The organism is a common soil and water inhabitant in tropical and subtropical areas. Fewer than 200 cases have been reported worldwide, with most recent reports coming from Southeast Asia.
How do you get Hafnia alvei?
alvei is found commonly in feces of humans and animals, in sewage, and in soil. Several reports suggest that H. alvei is one of the most frequently recovered members of the family Enterobacteriaceae in the human gastrointestinal tract.
How is Hafnia alvei treated?
Hafnia alvei was susceptible to amoxicillin/clavulanic acid and to first-generation cephalosporins in two cases. Susceptibility to aminoglycosides, imipenem, cotrimoxazole, ciprofloxacin, piperacillin and cefotaxime was very good (8/8). Four patients required invasive treatment.
What does Pseudomonas aeruginosa look like on Blood Agar?
The appearance of yellow-green to blue-colored colonies on cetrimide agar indicates the presence of P. aeruginosa. The colonies are medium-sized with irregular margins. The visual examination of the plates is performed by using ultraviolet light to detect the presence of fluorescein.
Is chromobacterium Violaceum gram positive?
C. violaceum is a facultatively anaerobic, gram-negative rod that is a saprophyte of soil and water and is found especially in tropical and subtropical climates. It causes occasional illness in animals and, rarely, in humans.
Is chromobacterium Violaceum Gram positive or negative?
Infection due to Chromobacterium violaceum, a large motile gram-negative bacillus, is a rare entity that typically starts with a localized skin infection or localized lymphadenitis after contact with stagnant water or soil.
Is Chromobacterium violaceum Gram positive or negative?
Is Hafnia alvei Gram positive or negative?
Hafnia alvei is a gram-negative facultatively anaerobic bacillus that belongs in the family Enterobacteriaceae. It is suspected to cause a variety of intestinal disorders, including gastroenteritis (2, 21, 24, 28, 35).