Panadero FR, López SC, Paz SA, Díez BP, Morrondo PP

Language: English/Spanish
References: 24
Page: 155-160
PDF size: 826.32 Kb.

ABSTRACT

From August 1994 to January 1995, oesophagi from bovines from different Galician farms euthanized in a local slaughterhouse, were collected weekly. Fifty-two out of 346 oesophagi (15%) harboured larvae of Hypoderma lineatum. Larvae were present in oesophagi from the end of August to mid December. The intensity of infestation was moderate; 46.8% of the oesophagi harboured from 1 to 5 larvae and only 8.8% more than 30 larvae. The average was 9 larvae, and the maximum 42 larvae per parasited bovine. Mean length of the larvae increased throughout the study (6.7 ± 1.75 mm in the end of August and 12.8±2.29 mm mid November). Ninety point five per cent of the larvae were located in the oesophageal submucosa, specially in its caudal part, and a low percentage (9.5%) in the serous that encloses the oesophagi externally, being considered as ectopic. Occasionally, nodules with a hard consistence were detected on oesophagi submucosa. In these nodules, different stages of destruction were found. Taking into account these results, it is considered that in the north of Spain the most adequate time to carry out preventive treatment against Hypoderma would be around October.

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