The prevalence of swine enteropathogens in Brazilian grower and finish herds

Abstract

Diarrhoea among growing and finishing pigs is an important problem in many herds. The prevalence of L. intracellularis, B. pilosicoli, B. hyodysenteriae, Salmonella spp., enterotoxigenic E. coli, Trichuris suis and the occurrence of mixed infection were investigated. Fecal samples for forty-six herds with diarrhea or a history of diarrhea were randomly collected in Minas Gerais state, Brazil. The enteric pathogens were detected by culture (E. coli and Salmonella sp.), PCR (L. intracellularis and Brachyspira spp.) and eggs counts (T. suis). The overall herd prevalence of L. intracellularis, Salmonella enterica serotype Typhimurium and enterotoxigenic E. coli were 19.56%, 6.52%, 10.86% respectively. Mixed infection was diagnosed in 30.43% of herds, and L. intracellularis and Salmonella enterica serotype Typhimurium are main pathogens association (10.87%). B. pilosicoli was diagnosed only in two herds, always associated with mixed infections. B. hyodysenteriae and T. suis were not demonstrated in any sample. These pathogens have been reported world-wide but studies regarding epidemiology in Brazil are few. This study contributes to establish of prevention programs for the control enteropathogens in grower finish herds in Brazil.

Antimicrobial susceptibility and phylotyping profile of pathogenic Escherichia coli and Salmonella enterica isolates from calves and pigs in Minas Gerais, Brazil

“…strains isolated from fecal samples of calves up to 90 days of age in 2008 (Coura et al 2015a) and Salmonella spp. (n = 39) strains isolated from fecal samples from growing/finishing pigs between January 2008 and February 2009 (Viott et al 2013) in the State of Minas Gerais, Brazil, were also tested. Salmonella spp.…”

“…The serotypes identified among strains isolated from pigs were Typhimurium (n = 32), Agona (n = 5), and S. enterica subsp. enterica (n = 2) (Viott et al 2013).…”

“…Moreover, in the same region, frequency of Salmonella spp. infection was reported to be 16.4 % in calves and 6.52 % in growing and finishing pigs (Viott et al 2013;Coura et al 2015a).…”

Virulence-associated genes, antimicrobial resistance and molecular typing of Salmonella Typhimurium strains isolated from swine from 2000 to 2012 in Brazil

“…In 2010, Brazil produced 3·24 million tons of pork and exported it mainly to Russia, Hong Kong and Angola (ABPA ; Viott et al . ). Furthermore, the State of Santa Catarina in Brazil is the main producer of pork, accounting for 25% of the total production (ABPA ).…”

Resistance Phenotypes and Genotypes of Salmonella enterica subsp. enterica Isolates from Feed, Pigs, and Carcasses in Brazil

“…Besides carcasses and pork, Salmonella isolation has also been reported in feedstuffs and feed mills (7,21). In Brazil, Salmonella infection in swine herds has been demonstrated (30), and a relatively high prevalence of Salmonella isolation has been found in pigs at slaughter (17), as well as in carcasses (28).…”