Molecular epidemiology of ceftiofur-resistant Escherichia coli isolates from dairy calves

Article Abstract:

Healthy calves from a dairy herd in central Pennsylvania were analyzed each month over five-month period for fecal shedding of ceftiofur-resistant gram-negative bacteria. Ceftiofur resistant Escherichia coli isolates were characterized by antimicrobial resistance, serotype, pulse-field gel electrophoresis subtypes, beta-lactamase genes and virulence genes and the high prevalence of multidrug-resistant nonpathogenic Escherichia coli in calves could be significant source of resistant genes to other bacteria that share the same environment.

Pennsylvania, Health aspects, Genetic aspects, Drug resistance in microorganisms, Microbial drug resistance

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Multi-virulence-locus sequence typing of Listeria monocytogenes

Article Abstract:

Listeria monocylogenes is an intracellular food borne pathogen that contaminates a variety of food, causing listeriosis, which can be fatal. A multi-virulence locus sequence-typing (MVLST) scheme was developed to subtype Listeria monocytogenes and results were compared with other schemes developed in the past.

Causes of, Influence, Listeria monocytogenes, Listeriosis

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Antimicrobial-resistant enteric bacteria from dairy cattle

Article Abstract:

The antimicrobial-resistant gram-negative enteric bacterial isolates were analyzed to find its resistance to ampicillin, centiofur, chloramphenicol, florfenicol, spectinomycin and tetracycline. The strains of Escherichia coli isolated from cattle were found to exhibit multidrug resistance.

Pharmaceutical Preparation Manufacturing, Pharmaceutical preparations, Antiinfective Preparations, Usage, Physiological aspects, Anti-infective agents

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