Serological investigation of horse sera for antibodies against mycoplasmas and acholeplasmas.

The research article is an investigation into the presence of specific antibodies against mycoplasmas and acholeplasmas in horse sera, drawn from horses with respiratory disease and mares after abortion. The study reveals that antibodies were found for all tested species, especially acholeplasmas, with similar patterns in horses with respiratory disease and post-abortion mares.

Objective and Methodology

• The study aims to understand if horse sera, especially from horses with respiratory disease (RD) and mares after an abortion, contain antibodies against certain Mycoplasma and Acholeplasma species.
• The researchers used a variety of serological tests, including the complement fixation test, indirect hemagglutination test, enzyme immune assay, and the metabolic inhibition test to detect these antibodies.
• The Mycoplasma and Acholeplasma species examined included M. equirhinis, M. subdolum, M. equigenitalium, M. pulmonis, M. felis, A. laidlawii, A. hippikon, and A. equifetale.

Findings

• The results revealed that antibodies were found against all the tested Mycoplasma and Acholeplasma species, with more occurrences against Acholeplasmas.
• The antibody pattern was similar both in horses suffering from RD and mares post-abortion.

Test Result Comparison

• The comparative analysis of the four used serological tests showed only limited correlation, indicating that each test might be detecting different aspects of the immune response or have different specificities or sensitivities for various mycoplasmas or acholeplasmas.
• The percentage of sera in which antibodies were detected varied significantly across the four tests, further suggesting differences between the test methods or perhaps interacting factors within the sera influencing test outcomes.

Implications

• The discovery of such antibodies against Mycoplasma and Acholeplasma species could indicate that these organisms might be involved in horse respiratory disease and post-abortion complications.
• The discrepancies in detection rates across the different test methods suggest a need for standardization or identification of the most reliable test for such investigations. This could be crucial for effective disease control and to mitigate potential breeding complications.