Effects of location for collection of air samples on a farm and time of day of sample collection on airborne concentrations of virulent Rhodococcus equi at two horse breeding farms
| Autor: | Craig N. Carter, Naisyin Wang, Nathan M. Slovis, Anthony E. Cattoi, Kyle R. Kuskie, Jacqueline L. Smith, M. Keith Chaffin, Randolph S. Stepusin, Shinji Takai, Noah D. Cohen |
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| Rok vydání: | 2011 |
| Předmět: |
Air sampling
Veterinary medicine Time Factors animal diseases Air microbiology Air Microbiology Virulence Wind Article Time of day Animal science Rhodococcus equi biology.animal parasitic diseases Animals Horses General Veterinary biology Temperature Horse Humidity General Medicine biology.organism_classification Housing Animal Foal Female Horse Diseases Sample collection |
| Zdroj: | American Journal of Veterinary Research. 72:73-79 |
| ISSN: | 0002-9645 |
| Popis: | Objective—To determine whether airborne concentrations of virulent Rhodococcus equi at 2 horse breeding farms varied on the basis of location, time of day, and month. Sample Population—2 farms in central Kentucky with recurrent R equi-induced pneumonia in foals. Procedures—From February through July 2008, air samples were collected hourly for a 24-hour period each month from stalls and paddocks used to house mares and their foals. Concentrations of airborne virulent R equi were determined via a modified colony immunoblot technique. Differences were compared by use of zero-inflated negative binomial methods to determine effects of location, time, and month. Results—Whether mares and foals were housed predominantly in stalls or paddocks significantly affected results for location of sample collection (stall vs paddock) by increasing airborne concentrations of virulent R equi at the site where horses were predominantly housed. Airborne concentrations of virulent R equi were significantly higher from 6:00 pm through 11:59 pm than for the period from midnight through 5:59 am. Airborne concentrations of virulent R equi did not differ significantly between farms or among months. Conclusions and Clinical Relevance—Airborne concentrations of virulent R equi were significantly increased when horses were predominantly housed at the site for collection of air samples (ie, higher in stalls when horses were predominantly housed in stalls and higher in paddocks when horses were predominantly housed in paddocks). Concentrations of virulent R equi among air samples collected between the hours of 6:00 am and midnight appeared similar. |
| Databáze: | OpenAIRE |
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