Infection Dynamics and Antimicrobial Resistance Profile of Salmonella Paratyphi B d-tartrate Positive (Java) in a Persistently Infected Broiler Barn

Franziska Kloska, Martin Beyerbach and Günter Klein
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Franziska Kloska: Veterinary Practice and Laboratory Wilms-Ellert-Klosterhalfen, Lohe 13, D-49429 Visbek, Germany
Martin Beyerbach: Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine, Bünteweg 2, D-30559 Hannover, Germany
Günter Klein: Institute of Food Quality and Food Safety, University of Veterinary Medicine, Bischofsholer Damm 15, D-30173 Hannover, Germany

IJERPH, 2017, vol. 14, issue 1, 1-12

Abstract: The infection dynamics of S. Java were examined in three consecutive rearing periods on a broiler farm in Northwestern Germany which had been persistently infected with S. Java for more than five years. The barn was investigated for Salmonella occurrence after cleaning and disinfection to verify the persistent contamination of the broiler house with S . Java before the start of the first rearing cycle. Confirmation of Salmonella absence in day-old chicks (time-point 1) as well as early establishment of infection between days 5–7 (time-point 2) were confirmed by caecal swabs prepared for qPCR and classical microbiological methods. At three time-periods (between days 11–15 (time-point 3), days 25–28 (time-point 4), and days 38–40 (time-point 5)) caecal content was examined for colony forming units (CFU) Salmonella /g. In general, there was an increase in Salmonella Java load at time-point 4 compared to time-points 3 and 5. Therefore, we observed a bell-shaped course of infection resulting in higher rates of Salmonella CFU/g prior to prethinning than at final slaughter. The antimicrobial susceptibility testing revealed resistance to tetracycline, fluorquinolones, trimethoprim, and cefoxitin.

Keywords: Infection dynamics; S. Java; broilers; antimicrobial resistance; veterinary public health (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2017
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