Is Hafnia alvei citrate positive?

Is Hafnia alvei citrate positive?

alvei were positive for the fermentation of d-glucose and l-arabinose, decarboxylation of lysine and ornithine, and utilization of citrate and OF-glucose and were negative for fermentation of sucrose, d-sorbitol, raffinose, myoinositol, d-adonitol, and melibiose; hydrogen sulfide (H2S) production; indole production; …

What does Hafnia alvei do?

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.

Is Hafnia indole positive?

Division 2 contained seven distinct biotypes, the largest of which was referred to as type 32011 (35 cultures). Type 32011 and related types had properties generally consistent with inclusion in the genus Hafnia, being indole, lactose, and sucrose negative; aerogenic; and Voges-Proskauer (VP) positive.

Does Hafnia alvei flagella?

Hafnia alvei is a flagellated, motile, facultative anaerobic opportunistic pathogen of the Enterobacteriaceae family, which is also known to play a role in microbial food spoilage [1]. alvei have been most intensively reported in the 1990s.

Does Hafnia alvei Sporulate?

alvei) is a rod-shaped, gram-negative, facultative anaerobe, which is part of the Enterobacteriaceae family [1]. A taxonomic study was published on the genus Hafnia by Greipsson and Priest in 1983 [2]. It is an oxidase-negative, catalase-positive, and non-sporulating organism.

Is Hafnia alvei a lactose fermenter?

H. alvei (formerly Enterobacter hafniae) is currently the sole species in the genus Hafnia. It resides in the gastrointestinal tract of humans and many animal species. These microorganisms are motile but do not ferment lactose.

What disease does Hafnia alvei cause?

H. alvei is an uncommon cause of infection, having been implicated as a cause of diarrhea, BSI, meningitis, urinary tract infection (UTI), wound infection, intra-abdominal abscess, and empyema in immunocompetent and immunocompromised individuals. Most infections in adults are healthcare-associated.

How is Hafnia alvei treated?

Appropriate antibiotic therapy with cefepime followed by oral ciprofloxacin brought about rapid resolution of symptoms and complete recovery. H. alvei may cause severe infection in transplant patients without predisposing factors such as hospitalization, invasive procedures, or antibiotic treatment.

What are the phenotypic characteristics of Hafnia alvei?

Phenotypic characteristics of Hafnia alvei + = 90–100% positive; [+] = 75–89% positive; v = 26–74% positive; [−] = 11–25% positive; − = 0–10% positive. 10–15% of the strains ferment lactose slowly. Table 2. Differential characteristics of Hafnia alvei and biochemically similar species

Where can I find Hafnia alvei in the wild?

H. alvei occurs in many natural environments such as surface waters, soil, sewage and vegetation. H. alvei has been reported to be one of the major species which contribute to the microbial ecology of silage. It has been isolated from the polluted waters of fish farms as well as from the unpolluted northern rivers of Finland.

Is the Hafnia alvei rod motile or Gram negative?

H. alvei is a Gram-negative facultatively anaerobic rod, and it conforms to the general definition of Enterobacteriaceae. It is only about 20% related to the other species of the family. Most strains are motile.

What is the natural susceptibility of Escherichia alvei?

Bangladeshi diarrheagenic Hafnia alvei-like strains have been described recently as the new species Escherichia albertii (Int J Syst Evolut Microbiol. 2003;53:807-810). The natural susceptibility of 21 E. albertii and 76 H. alvei strains to 69 antimicrobial agents was examined, applying a microdilut …

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