Occurrence of Trichinella spp. in rats on pig farms
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National Veterinary Research Institute, Puławy, Poland
Institute of Rural Health, Lublin, Poland
Ewa Bilska-Zając   

National Veterinary Research Institute, Puławy, Poland, Partyzantów Avenue, 57, 24-100 Puławy, Poland
Ann Agric Environ Med. 2018;25(4):698–700
The highest risk of trichinellosis for human is considered in eating meat products containing live larvae, mostly from wild boars or pigs. Spreading of Trichinella spp. may occur in various ways, one of which is transmission by vectors. The rat is considered to be the most common vector for Trichinella parasite. The population of rats living on pig farms can play an important role in maintaining or spreading the parasite to other animals.

The aim of presented survey was to investigate the occurrence of Trichinella spp. in rats on farms with pigs infected with this parasite.

Material and methods:
From pig farms selected for study, the muscles of collected rats were investigated by magnetic stirrer digestion method to assess occurrence of Trichinella in the rat population. Isolated Trichinella parasites were identified under stereomicroscope and multiplex PCR were performed for species identification.

Rats infected with Trichinella spp. were discovered on three of five investigated pig farms. The mean extent of invasion in rats from the studied farms was 23.33%. The calculated medium intensity of invasion was 4.09 lpg (larvae per gram) (SD 5.41). All larvae of Trichinella discovered from rats were identified as T.spiralis.

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