Campylobacter News

Highlights from 18th International Campylobacter Conference

CHRO 18th International Workshop on Campylobacter, Helicobacter & Related Organisms (CHRO) was held on November 1-5, 2015 in New Zealand (http://www.chro2015.com/).  The conference hosted a few hundred attendees from academia, government and industry from all over the world. The presenters communicated their very recent research findings on a wide range of topics including epidemiology, genomics and diagnostics. A significant portion of the talks (including the plenary lectures as well as keynotes) were dedicated to Campylobacter in poultry including the source of infection, colonization characteristics, and control strategies at both preharvest and postharvest levels.
The presenters from Europe under CamCon project provided two brochures on Campylobacter at poultry farm level with the intent of communicating research findings with poultry producers to facilitate education and implementation of practical measures for reducing the risk of Campylobacter on farms. Both brochures (Best Practice Manual; Draft Certification Program) as well as an “e-learning program on Campylobacter” are available online at www.camcon-eu.net .  It should be noted that information provided in these resources is for general guidance only and would need to be integrated into existing systems and quality programs in the US poultry production conditions to be applicable and effective.

Intra-cloacal inoculation as an effective screening method of potential probiotics against Campylobacter in poultry

Bacterial isolates collected from healthy chickens and shown to have anti-Campylobacter properties in vitro were evaluated for efficacy against C. jejuni after oral or intra-cloacal inoculation into day-old broiler chicks. Seven days after, the birds were challenged orally with C. jejuni and numbers of Campylobacter in ceca were determined at necropsy on day 14 of age. Only one bacterial isolate had a 1-log reduction in Campylobacter counts following oral dosage, while six of the isolates from healthy birds produced a 1-3 log reduction in cecal Campylobacter counts when given intra-cloacally. The results indicate that screening of potential probiotic isolates by directly placing them in the lower intestinal tract via cloacal inoculation may eliminate the time and expense of encapsulating ineffective isolates.

Efficacy of commercial antimicrobials on Campylobacter varies between types of poultry meat.

Under simulated commercial water chilling conditions, the effectiveness of trisodium phosphate (TSP) and sodium hypochlorite (SH) against Campylobacter on skinned duck meat and chicken meat was determined after artificial inoculation of the meats with a cocktail of Campylobacter at two different inoculum level. All three TSP concentrations significantly reduced numbers of Campylobacter on both duck and chicken meat. Whereas higher concentrations of TSP resulted in a Campylobacter contamination level less than the limit of detection on duck meat regardless of the dose of inoculum, the same effect was observed in chicken meat only when challenged with the low dose of inoculum. The effectiveness of SH was less prominent than that of TSP on both type of meats. The results indicate that chicken meat could effectively protect Campylobacter against TSP and SH while duck meat could not. Of note, similar results were obtained with Salmonella, indicating the potential of TSP for application in a commercial poultry processing to reduce foodborne pathogens, especially on duck meat.

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