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Broncho-pulmonary helminths of chamois (Rupicapra rupicapra parva) captured in North-West Spain: assessment from first stage larvae in faeces and lungs.

The bronchopulmonary helminths of 66 chamois (49 males and 17 females), captured in various parts of the Cantabrian mountain range (N. W. Spain) in the autumn of 1983, and in the summer and the autumn of 1984, were studied. The animals were adult and aged between 2 and 16 years. The lungs, trachea and faeces from the last section of the intestine were taken from each animal individually. The trachea and pulmonary larval nodules were dissected. First stage larvae (L-I) were obtained from finely cut up pulmonary tissue and from faeces by migration. The number of larvae I per gram varied between 0.08 and 2,662 (mean = 151.5 +/- 59.5 s. e.) in the faecal samples, and between 0.03 and 1,733 (mean = 65.2 +/- 32.4 s. e.) in the pulmonary ones. There was a low correlation between the two sets of data. When taking into account age and sex, no statistically significant differences were observed in relation to the number of larvae/gram found either in faeces or in pulmonary tissue, while there were statistically significant differences when considering the periods of sampling and reserve of origin, in relation to the larvae found in faeces and lungs, respectively. Infections by three nematodes (Neostrongylus, Muellerius and Protostrongylus) were more common than those produced by two or one, in the lungs as well as in the faeces. The most common genus was Neostrongylus, followed by Muellerius, and no Cystocaulus or Dictyocaulus larvae were found.