Mapping of quantitative trait loci affecting resistance/susceptibility to Sarcocystis miescheriana in swine.

The outcome of infectious diseases in vertebrates is under genetic control at least to some extent. In swine, e.g.

Genetic resistance to Sarcocystis miescheriana in pigs following experimental infection.

Clinical and parasitological traits of Sarcocystis miescheriana differ in Pietrain and Meishan pigs. For further description and characterization of the genetic basis of this variation a F(2) family based on Pietrain boars and Meishan sows as founders was generated. One hundred and thirty-nine F(2) pigs were challenged orally at an age of 100 days with 50,000 sporozysts to produce the typical clinical picture of a moderate dose Sarcocystis infection.

Comparative genetic characterization of Porcine Circovirus type 2 samples from German wild boar populations.

PCV-2 is involved in "postweaning multisystemic wasting syndrome" (PMWS), "porcine dermatitis and nephropathy syndrome" (PDNS), respiratory and reproductive disorders, and thereby plays a crucial role in today's swine production world-wide. The virus is apparently ubiquitous in domestic pigs and has also been demonstrated in wild pigs. Up to now, a characterization of PCV-2 samples from wild pigs, which might help to estimate the possible role of wild pigs as sources of domestic pig infection, has not been carried out.

[Diagnosis of Lawsonia intracellularis using the polymerase chain reaction (PCR) in pigs with and without diarrhea and other animal species].

Lawsonia (L.) intracellularis, an obligately intracellular bacterium, causes proliferative enteropathy (PE) in swine and, occasionally, in other animals. To determine the spread of the agent among German pig herds pooled fecal samples of five animals each of clinically normal Hessian pig herds collected between november 1998 and february 1999 as well as feces (n = 1684) from individual animals representing 648 herds, sent to our laboratory by veterinarians from all parts of Germany, were tested for L.