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Arcobacter species in diarrhoeal faeces from humans in New Zealand
Owen Mandisodza1, Elizabeth Burrows, Mary Nulsen
1Hawke's Bay Hospital Laboratory, Hastings, New Zealand.
Aim:
To determine the prevalence, genetic diversity and antimicrobial susceptibility of Arcobacter spp in faecal samples from humans with diarrhoea in New Zealand.
Methods:
An enrichment method was used to isolate Arcobacter spp from diarrhoeal human faeces submitted to a community laboratory in Hawke's Bay. The identity of isolates was confirmed by PCR and their diversity was determined by pulsed field gel electrophoresis (PFGE). Antibiotic susceptibility was established with E test strips.
Results:
Arcobacter spp were isolated from 12 of 1380 diarrhoeal faecal samples examined (0.9%), including 7 A. butzleri and 5 A. cryaerophilus. Additional enteric pathogens were detected in four of these diarrhoeal faecal samples. All the Arcobacter isolates were genetically distinct and susceptible to ciprofloxacin. Most were also susceptible to erythromycin (92%) but fewer to tetracycline (67%) and ampicillin(50%).
Conclusion:
A. butzleri and A. cryaerophilus cause a small proportion of cases of diarrhoea in humans resident in New Zealand.
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