Korean J Parasitol.  1997 Jun;35(2):111-117. 10.3347/kjp.1997.35.2.111.

Rapid detection of Theileria sergenti by polymerase chain reaction

Affiliations
  • 1National Veterinary Research Institute, RDA, Anyang, Korea.

Abstract

Four separate pairs of oligonucleotide primers within the coding region in a T. sergenti 33-kDa surface protein gene were selected to detect T. sergenti by PCR. The specificity of PCR-amplified DNA was examined by digestion with restriction enzyme and Southern blot hybridization using T. sergenti p33 DNA probe. PCR appears to be specific for T. sergenti, without detectable signals from uninfected erythrocytes, uninfected bovine leukocytes and other hemoparasites, including A. marginale and B. ovata. Although 46 of 71 specimens (64.8%) from grazing cattle were microscopically positive, PCR in this study showed that 64 specimens (88.7%) were positive. Therefore, PCR proves a useful diagnostic tool for detecting T. sergenti-infected cattle. In addition, it is also revealed that PCR was significantly more sensitive than traditional microscopic examination using Giemsa's stain.


MeSH Terms

Animal
Antigens, Protozoan/genetics
Antigens, Surface/genetics
Cattle
DNA, Protozoan/analysis
Polymerase Chain Reaction
Protozoan Proteins/genetics
Theileria/isolation & purification*
Theileria/genetics
Theileriasis/parasitology
Theileriasis/diagnosis*
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