Two species of Cryptosporidium are routinely found in pigs: Cryptosporidium suis and Cryptosporidium pig genotype II. Identification of Cryptosporidium species and genotypes currently relies on molecular methods such as polymerase chain reaction (PCR) followed by restriction fragment lenght polymorphism (RFLP) or gene sequencing. However their applications are limited in identification of mixed infections. To overcome this problem, novel species specific primers were developed in this study. A total of 457 pig fecal samples were collected and examined using microscopy and molecular tools including PCR-RFLP, species or genus specific nested PCR and sequencing. Of these, 12.8 % were microscopicaly positive for oocysts presence and 36.5 % using molecular methods. While PCR-RFLP with genus specific primers revealed 1 case of C. suis and Cryptosporidium pig genotype II mixed infection only, nested PCR with species specific primers identified 41 cases of mixed infections. Our results showed that C. suis is infectious for all age categories of pigs and Cryptosporidium pig genotype II has been found in animals older than 6 weeks of age. Morphometric analysis proved oocyst size difference between both pig specific Cryptosporidium spp. Histological examination revealed that Cryptosporidium pig genotype II infects epithelia of both small and large intestine.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:50784 |
| Date | January 2010 |
| Creators | JENÍKOVÁ, Martina |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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