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Precipitating antibodies against Micropolyspora faeni in equines in north-western India
Abstract:
Prevalence of serum precipitins against Micropolyspora faeni, Thermoactinomyces vulgaris and Aspergillus fumigatus, employing the counterimmunoelectrophoresis (COIE) and Ouchterlony's double diffusion (DD) techniques, is reported in 162 of the equines stationed at two military installations in north-western India. M. faeni specific precipitins were demonstrable in 58 of 112 mules from site I in the mountainous region whereas the results were negative for all of the 50 horses examined from site II located in the plains. Of the 58 M. faeni positive mules, 45 (78%) had signs and symptoms suggestive of chronic obstructive pulmonary disease (COPD) while the remaining 13 (22%) were apparently free from any respiratory disorder. The more frequent occurrence of M. faeni precipitins in the symptomatic than in the asymptomatic group of mules was found to be statistically significant (P less than 0.01). Precipitins against A. fumigatus were concomitantly demonstrated in 5 of the mules afflicted with COPD and found to be positive for M. faeni.
Insights
Serum antibodies against Micropolyspora faeni were found in 58% of mules with chronic obstructive pulmonary disease (COPD). This suggests a link between M. faeni exposure and respiratory illness in equines.
Area of Science:
- Veterinary Medicine
- Immunology
- Environmental Health
Background:
- Equine respiratory diseases pose significant health and economic challenges.
- Hypersensitivity pneumonitis in equines is often linked to environmental aeroallergens.
- Micropolyspora faeni is a known causative agent of hypersensitivity pneumonitis in livestock.
Purpose of the Study:
- To investigate the prevalence of serum precipitins against Micropolyspora faeni, Thermoactinomyces vulgaris, and Aspergillus fumigatus in equines.
- To determine the association between M. faeni antibodies and chronic obstructive pulmonary disease (COPD) in equines.
Main Methods:
- Serum samples from 162 equines (112 mules, 50 horses) at two military installations were tested.
- Counterimmunoelectrophoresis (COIE) and Ouchterlony's double diffusion (DD) techniques were used.
- Clinical signs of respiratory disease were assessed and correlated with serological results.
Main Results:
- Serum precipitins against M. faeni were detected in 58 of 112 mules (51.8%) from a mountainous region; no antibodies were found in horses from plains.
- A statistically significant higher prevalence of M. faeni precipitins was observed in symptomatic mules (78%) compared to asymptomatic ones (22%).
- Concomitant precipitins against Aspergillus fumigatus were found in 5 COPD-afflicted mules positive for M. faeni.
Conclusions:
- Micropolyspora faeni exposure is significantly associated with chronic obstructive pulmonary disease in equines, particularly mules in mountainous environments.
- Serological detection of M. faeni antibodies can serve as a valuable diagnostic marker for equine respiratory disease.
- Further research into environmental factors and management strategies is warranted to mitigate M. faeni-related respiratory conditions in equines.