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Relationship between the conditions of lower airways in healthy horses, environmental factors and air quality in stables

Pferdeheilkunde, ISSN: 0177-7726, Vol: 16, Issue: 6, Page: 579-586
2000
  • 15
    Citations
  • 0
    Usage
  • 7
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    15
    • Citation Indexes
      15
  • Captures
    7

Article Description

In 6 healthy Haflinger horses stabled in individual boxes, different types of bedding (husk, straw and woodshavings) and hay (dry and soaked) were periodically changed. After each test period (45 days) bronchoalveolar lavage (BAL) was carried out for each horse, and the BAL fluid (BALF) withdrawn was submitted for citological and microbiological evaluation. The environmental dust burden was evaluated by means of an air filtration system and an optical counter with laser diode. Dust particles were sorted in eight size classes ranging from 0.3 to >20 μm. Qualitative evaluation of dust components was achieved by means of a Surface air system sampler (Sas). Total dust, which ranged from 0.03 mg/m to 0.40 mg/m, prooved highly related with mast cell differential count (r = 0.61; P = 0.03). Besides, BALF mastcells differential count decreased significantly when hay was soaked. BALF alveolar macrophages showed a negative relationship with particles ranging from 1 to 2 μm (r = -0.55; P = 0.05) and from 2 to 5 μm (r = -0.61; P = 0.03), considered as respirable fraction (RF). It was concluded that even in healthy horses the investigated factors may play an important role in lower airways condition.

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