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Parasitol Res. 1998 Jul;84(7):537-43.

Natural Ascaris suum infections in swine diagnosed by coprological and serological (ELISA) methods.

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  • 1Danish Centre for Experimental Parasitology, Royal Veterinary and Agricultural University, Frederiksberg C. aro@kvl.dk

Abstract

Paired samples of faeces and blood were collected from weaners (W), fatteners (F), lactating sows (S) and piglets (P) in 20 Danish sow herds. The samples were examined by a McMaster technique for Ascaris suum eggs and an indirect ELISA for anti-A. suum IgG. The coprological and serological results were significantly correlated for W and F (P < 0.0001) but not for S (P = 0.35). The coproprevalences were much lower (W 4.0%, F 15.5%, S 7.4%) than the seroprevalences (W 20.3%, F 50.5%, S 65.4%). Thus, egg counts greatly underestimate the proportion and number of A. suum-exposed pigs even in the young susceptible age groups. The ELISA ODs of the piglets were closely correlated with those of their mothers (P < 0.0001), although the mean OD decreased gradually from 111% of the mean sow OD in the 1st week of life to 48% at 5-6 weeks of age. It is concluded that the ELISA technique gives a more realistic impression of A. suum exposure levels in swine herds than do faecal egg counts.

PMID:
9694368
[PubMed - indexed for MEDLINE]
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