In farms with a clinical or even a latent infection, the disease is identified by isolating the pathogen. Since Salmonella bacteria are not shed continuously, the most suitable method for this is the testing of several pooled faecal samples obtained from different pens. The herd can also be screened by collecting swipe samples from the floor and surroundings in order to identify introduction routes and areas in the pig houses with particularly high pathogen burdens.

Methods that can be additionally used to test sow farms for Salmonella include serological antibody detection or bacteriological detection in the ileocaecal lymph nodes.

Ceva, Swine samples from environment

Ceva, sock swaps as pooled feces samples

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Find here the  comprehensive information about the latest development in PCR technology to differentiate Salmonella field strain from vaccination strain and to determine  S. Typhimurium:
BIOTECON Diagnostics Product Sheet Vetproof STM Vaccine Detection 1 Kit …