Document Detail

Recovery from transport and acclimatisation of competition horses in a hot humid environment.
MedLine Citation:
PMID:  11469770     Owner:  NLM     Status:  MEDLINE    
The aims of the present field-based study were to investigate changes in fit horses undergoing acclimatisation to a hot humid environment and to provide data on which to base recommendations for safe transport and acclimatisation. Six horses (age 7-12 years) were flown from Europe to Atlanta and underwent a 16 day period of acclimatisation. Exercise conditions during acclimatisation (wet bulb globe temperature index 27.6+/-0.0 [mean +/- s.e.]) were more thermally stressful compared with the European climate from which the horses had come (22.0+/-1.8, P<0.001). Following the flight, weight loss was 4.1+/-0.8% bodyweight and took around 7 days to recover. Water intake during the day was significantly increased (P<0.05) compared with night during acclimatisation. Daily mean exercise duration was 72+/-12 min and the majority of work was performed with a heart rate below 120 beats/min. Respiratory rate (fR) was increased (P<0.05) throughout acclimatisation compared with in Europe, but resting morning (AM) and evening (PM) rectal temperature (TREC), heart rate (fC) and plasma volume were unchanged. White blood cell (WBC) count was significantly increased at AM compared with in Europe on Days 4 and 10 of acclimatisation (P<0.01), but was not different by Day 16. In conclusion, horses exposed to hot humid environmental conditions without prior acclimatisation are able to accommodate these stresses and, with appropriate management, remain fit and clinically healthy, without significant risk of heat illness or heat-related disorders, provided they are allowed sufficient time to recover from transport, acclimatisation is undertaken gradually and they are monitored appropriately.
D J Marlin; R C Schroter; S L White; P Maykuth; G Matthesen; P C Mills; N Waran; P Harris
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Equine veterinary journal     Volume:  33     ISSN:  0425-1644     ISO Abbreviation:  Equine Vet. J.     Publication Date:  2001 Jul 
Date Detail:
Created Date:  2001-07-25     Completed Date:  2001-08-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0173320     Medline TA:  Equine Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  371-9     Citation Subset:  IM    
Centre for Equine Studies, Animal Health Trust, Newmarket, Suffolk, UK.
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MeSH Terms
Acclimatization / physiology*
Body Temperature
Body Weight
Feeding Behavior
Heart Rate
Heat Stroke / prevention & control,  veterinary
Horse Diseases / prevention & control
Horses / physiology*
Hot Temperature
Tropical Climate

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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