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Microbial food borne pathogens. Salmonella

H E Ekperigin1, K V Nagaraja

  • 1Division of Animal Feeds, Center for Veterinary Medicine, Food and Drug Administration, Rockville, Maryland, USA.

The Veterinary Clinics of North America. Food Animal Practice
|April 9, 1998
PubMed
Summary
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Salmonella bacteria infect all food animals, potentially causing illness or leading to carrier states. These carriers are a significant source of foodborne Salmonella infections and antibiotic-resistant strains in humans.

Area of Science:

  • Microbiology
  • Food Safety
  • Veterinary Medicine

Background:

  • Salmonella are gram-negative, facultative anaerobic bacilli within the Enterobacteriaceae family.
  • Over 2200 distinct Salmonella serotypes exist, differentiated by antigen profiles.
  • Salmonella infections can cause localized gastro-enteritis or generalized septicemia (salmonellosis).

Purpose of the Study:

  • To highlight the prevalence of Salmonella in food animals.
  • To underscore the role of food animals as reservoirs for Salmonella.
  • To emphasize the public health implications of Salmonella contamination in food products.

Main Methods:

  • The study is based on a review of existing scientific literature on Salmonella.
  • Analysis of Salmonella characteristics, including morphology and serotyping.

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  • Examination of disease transmission pathways from food animals to humans.

    • Main Results:

    • All food animals are susceptible to Salmonella infection.
    • Infected animals can become asymptomatic carriers, shedding Salmonella.
    • Recovered animals also act as persistent sources of Salmonella.
    • Contaminated food animal carcasses pose a risk for human food poisoning.
    • A significant concern is the presence of antibiotic-resistant Salmonella in food animals.

    Conclusions:

    • Food animals are a primary reservoir for diverse Salmonella serotypes.
    • Asymptomatic and recovered animals are critical in the transmission cycle.
    • Salmonella contamination in food animals presents a dual threat: foodborne illness and antibiotic resistance.
    • Effective control measures in food animal populations are crucial for public health protection.