Isolation of Yersinia enterocolitica from selected animal species.

The article shows that Yersinia enterocolitica, a type of bacteria, has been found in laboratory rats, mice, hamsters, dogs, cats, pigs, cattle, horses, and deer, with two isolates from dogs and one in a pig.

Isolation of Yersinia enterocolitica

In this study, researchers focused on isolating Yersinia enterocolitica, a bacterium known for causing gastrointestinal infections.

• 1,002 fecal samples were taken from large a variety of animals including laboratory rats, mice, hamsters, dogs, cats, pigs, cattle, horses, and deer.
• Yersinia enterocolitica was detected in only five of these samples, where adequate isolation and detection techniques were applied.

Distribution Among Animals

The researchers discovered that infection rates varied among different animal species.

• Of 202 dogs tested, two were found to host the bacteria – an infection rate of 1%.
• One pig, from a sample size of 107, was found to be infected, representing a slightly lower infection rate of 0.9%.
• So, it was established that dogs and pigs had a higher risk of carrying the bacteria.

Biotype 1 Isolation

All the isolates from both dogs and the pig were biotype 1.

• Biotype 1 is one of the types of Yersinia enterocolitica strain.
• The identification of biotype 1 suggests a common source or pattern of infection among the species tested.

Atypical Yersinia enterocolitica Isolation

Researchers have also detected atypical environmental Yersinia enterocolitica in a cow and a horse.

• Of 141 cows tested, one was found to carry atypical environmental Yersinia enterocolitica.
• Similarly, among 101 tested horses, one was also found to carry the bacteria.
• This pointed to a slightly lower infection rate for these species, at 0.7% for cows and 1% for horses.

Summary of Findings

The results of the study show that Yersinia enterocolitica can be isolated from certain animals, although the prevalence rates are relatively low and uneven among different species. Notably, the isolates were not recovered from other animal species tested, indicating that all species do not equally harbor this bacterium.