Species-specific amplification by PCR of ribosomal DNA from some equine strongyles.

The research article presents the development of a Polymerase Chain Reaction (PCR) method to specifically amplify the ribosomal DNA of certain species of horse parasites or strongyles, enhancing the potential for their diagnosis and further study.

Objective of the Study

The main objective of the study was:

• To characterize the internal transcribed spacer sequences of 28 horse strongyle species.
• To design specific oligonucleotide primers for some species based on the nucleotide differences.
• To develop a PCR method for the specific amplification of ribosomal DNA of Strongylus vulgaris, Cyathostomum catinatum, Cylicocyclus nassatus, Cylicostephanus longibursatus or Cylicostephanus goldi.

Methodology

Through this research, the researchers followed several steps:

• Initially, they characterized the first and second internal transcribed spacer sequences of 28 different species of horse strongyle.
• They utilized the differences in nucleotide sequences to design specific oligonucleotide primers for some species.
• Employing these primers, they developed a PCR approach to specifically amplify the ribosomal DNA of Strongylus vulgaris, Cyathostomum catinatum, Cylicocyclus nassatus, Cylicostephanus longibursatus, and Cylicostephanus goldi.
• They tested the method using parasite DNA derived from faecal samples and/or copro-cultures.

Results and Implications

The results showed that:

• The developed PCR method enabled the species-specific amplification of parasite DNA from faecal samples and/or copro-cultures.
• This result demonstrated the potential of the developed PCR approach for diagnosing equine strongyloidosis – a condition caused by strongyle infestation in horses.
• The establishment of this PCR assay will also aid in studying the biology and epidemiology of equine strongyles.
• Furthermore, it has strong implications for understanding anthelmintic resistance via faecal egg count reduction tests, potentially leading towards improved treatment strategies and prevention measures.