Effects of Infection of Eimeria tenella, E. acervulina, and E. maxima upon Salmonella typhimurium Infection in Chickens

Abstract

Three experiments were conducted to examine whether Salmonella typhimurium infection is enhanced by concurrent infection with Eimeria tenella, E. acervulina, or E. maxima. There were two groups in each experiment: birds infected with a daily oral dose of approximately 1 X 10(4) cfu of S. typhimurium for 5 days after coccidial infection and birds infected with S. typhimurium alone with the similar exposure schedule. Chickens were necropsied 7, 10, and 14 days after coccidial infection. The numbers of S. typhimurium in the contents of ceca and small intestine were counted, and numbers of chickens positive for S. typhimurium in the liver and bile were examined. In E. tenella infection, the S. typhimurium counts in the ceca and small intestine of concurrently infected chickens were significantly greater than those of birds infected with S. typhimurium alone. In E. acervulina infection, the S. typhimurium counts in the ceca of chickens killed 14 days after E. acervulina infection and the numbers of birds positive for S. typhimurium in the ceca of chickens killed 10 and 14 days after E. acervulina infection were significantly greater than those of chickens infected with S. typhimurium alone. In E. maxima infection, the numbers of birds positive for S. typhimurium in the ceca and liver of chickens killed 7 days after E. maxima infection were significantly greater than those of birds infected with S. typhimurium alone. Results of this study indicate that infection with E. acervulina or E. maxima is able to enhance S. typhimurium infection in chickens.

Eimeria tenella or Eimeria adenoeides: Induction of Morphological Changes and Increased Resistance to Salmonella enteritidis Infection in Leghorn Chicks

“…In contrast with published work demonstrating that clinical coccidiosis by ET increases susceptibility of poultry to Salmonella infections (Arakagwa et ah, 1981;Baba et al, 1982;Morishima et al, 1984;Takimoto et al, 1984;Kim et al, 1985), subclinical coccidiosis by ET did not increase the susceptibility of chicks to SE organ invasion in the present study. Interestingly, a significant dose-related ET-mediated decrease in the SE infection rate was observed (Table 1).…”

“…In fact, the pathological changes that occur during clinical coccidiosis caused by ET have been reported to increase the susceptibility of poultry to Salmonella infections (Arakawa et al, 1981;Baba et al, 1982;Fukata et al, 1984;Morishima et al, 1984;Takimoto et al, 1984;Kim et al, 1985).…”

Research Note: Invasion of Salmonella typhimurium into the Cecal Wall of Gnotobiotic Chickens with Eimeria tenella

“…Salmonella typhimurium infection in conventional chickens was enhanced by Eimeria tenella infection (Arakawa et al, 1981;Baba et al, 1982;Hikasa et al, 1982;Morishima et al, 1984;Takimoto et al, 1984). A similar effect was found in the germ-free chickens Kim et al, 1985).…”

Quantification of risk factors of coccidiosis in broilers by using logistic regression analysis

“…Previous studies have shown interaction between Eimeria and Salmonella (9,11,13,14) reviewed the interaction with Escherichia coli. Salmonella viruses Marek's disease.…”