Epizotiología de las bronconeumonías verminosas ovinas en León

Authors

  • Ángel Porfirio Ramírez Fernández

DOI:

https://doi.org/10.18002/analesdeveterinaria.v13.8919

Keywords:

Epizotiología, Bronconeumonías verminosas ovinas en León, Ganado ovino, Parasitología

Abstract

We hace carried out studies on slaughter-house animals, a coprology in several lots of sheep for one  year, and some experimental infestation test in different earthly gasteropods in order to know the epizootiology of ovine verminous bronchopneumonias in the province of León (Spain).

The species that have been identified are: Dictyocaulus filaria, Protostrongylus rufecens (tWo varieties), P. muraschkinzew (found for the first time in Spain), Cystocaulus ocreatus, Neotrongylus linearis and Muellerius capillaris (found for the first time in Spain).  As intermediary hosts of Protostrongylinae we have mainly found Cochlicella spp. (very receptive) and Helicella spp. (very ubiquitous), besides Chondrina, Cepea, Theba, Vitrina and Helix spp.

Verminous bronchopenumonias have a very important economical repercussion, specially infestations by Protostrongylus spp., Cystocaulus ocreatus and Dictyocaulus filaria.

Fecal elimination of larvase has a biscupidated seasonal rhythm, reaching its maximun in Spring and Autumn, the two most rainy seasons, whereas the thermometric curve has an opposite sign. The influence of immunity on the elimination of Protostrongylinae larvae is considered to be limited since, it has been fouend that old animals resist or tolerate a greater number of parasites than young ones.

By coordinating the results obtained we think there are two seasons in which there exists a great probability of infestation: in Spring and in Autumn. We think Autumn is the most dangerous season for Protostrongylinae. In acordance with these results we suggest to apply spring and fall treatments as a basis to attack these parasitosis.

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Published

1967-01-02

Issue

Section

Research papers