Nordisk veterinaermedicin
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Nordisk veterinaermedicin · Feb 1976
Streptococcal infections in sucking pigs. 1. Epidemiological investigations.
The investigation comprises 5,811 litters and 55,641 liveborn pigs. Among the pigs which died before weaning, infection with haemolytic streptococci (HS) was determined in 1,338. This corresponds to 2.4 per cent of the liveborn pigs (Table I). ⋯ Preliminary investigations on the source of infection and the pathogenesis are reported (Tables XII and XIII). In two herds, 8 of 10 sows carried HS on mucosal surfaces at the time of farrowing, and in 6 of 10 examined litters, HS bacteraemias were observed in pigs during the first days of life. Furthermore, an analysis showed that part of the sowa (109) lost pigs with HS infections in several (2-6) subsequent litters (Tables XIV) and XV).