Infection of chickens with antimicrobial-resistant Salmonella enterica Typhimurium DT193 and monophasic Salmonella Typhimurium-like variants: an emerging risk to the poultry industry?

B. N. ParsonsZoonotic Infection of Pigs and Poultry Group, Institute of Infection & Global Health, University of Liverpool, Leahurst Campus, Wirral, UK

G. CrayfordZoonotic Infection of Pigs and Poultry Group, Institute of Infection & Global Health, University of Liverpool, Leahurst Campus, Wirral, UK

T. J. HumphreyZoonotic Infection of Pigs and Poultry Group, Institute of Infection & Global Health, University of Liverpool, Leahurst Campus, Wirral, UK

P. WigleyZoonotic Infection of Pigs and Poultry Group, Institute of Infection & Global Health, University of Liverpool, Leahurst Campus, Wirral, UKCorrespondence[email protected]

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Table 1. Salmonella isolates used in this study and their antimicrobial resistance profile.

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Figure 1. Mean log₁₀ colony-forming units (CFU)/g (±standard deviation) numbers of salmonella at 3 and 7 days post infection in caecal contents (1a), liver (1b) and spleen (1c) following oral infection with 10⁸ CFU in SPF 8-day-old White Leghorn chickens. Bacterial counts determined by quantification on selective Brilliant Green agar. Data are based on five individually sampled birds for each group per time point. 4/74, S. Typhimurium 4/74; DT193, S. Typhimurium DT193. *P < 0.05, **P < 0.01 compared with bacterial counts in the 4/74 infected group.

Figure 1. Mean log10 colony-forming units (CFU)/g (±standard deviation) numbers of salmonella at 3 and 7 days post infection in caecal contents (1a), liver (1b) and spleen (1c) following oral infection with 108 CFU in SPF 8-day-old White Leghorn chickens. Bacterial counts determined by quantification on selective Brilliant Green agar. Data are based on five individually sampled birds for each group per time point. 4/74, S. Typhimurium 4/74; DT193, S. Typhimurium DT193. *P < 0.05, **P < 0.01 compared with bacterial counts in the 4/74 infected group.

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Infection of chickens with antimicrobial-resistant Salmonella enterica Typhimurium DT193 and monophasic Salmonella Typhimurium-like variants: an emerging risk to the poultry industry?

Table 1. Salmonella isolates used in this study and their antimicrobial resistance profile.

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Infection of chickens with antimicrobial-resistant Salmonella enterica Typhimurium DT193 and monophasic Salmonella Typhimurium-like variants: an emerging risk to the poultry industry?

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Table 1. Salmonella isolates used in this study and their antimicrobial resistance profile.

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