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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 92, No. 1, 1997, pp. 9-14
Bioline Code: oc97002
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 92, No. 1, 1997, pp. 9-14

 en Abdominal Angiostrongylosis in southern Brazil - prevalence and parasitic burden in mollusc intermediate hosts from eighteen endemic foci
Paulo R Rambo; Aventino A Agostini & Carlos Graeff-Teixeira

Abstract

Angiostrongylus costaricensis is a parasitic nematode of rodents and
molluscs are the intermediate hosts. Nocturnal collection of molluscs and
search for infective third stage larvae of A. costaricensis was
carried out in 18 endemic foci identified by the notification of a
confirmed diagnosis in human biopsies or surgical specimens. Molluscs were
digested in acidic solution and isolation of larvae eventually present was
done in a Baermann funnel. Larvae identified by the presence of a delicate
groove in the tail were counted to assess the individual parasitic burden.
Four species were found infected, with ranges of prevalence in parenthesis:
Phyllocaulis variegatus (7% to 33.3%); Bradybaena similaris (11.7% to
24.1%); Belocaulus angustipes (8.3% ) and Phyllocaulis soleiformis (3.3% to
14.2%). Parasitic burden varied from 1 to 75 with P. variegatus, 1 to 98
with B. similaris, 1 to 13 with B. angustipes and 1 larvae in each of two
specimens of P. soleiformis. P. variegatus was present in all sites and
was found infected with the highest prevalence figures and the highest
individual parasitic burdens. These data stress the importance of 
veronicellid slugs as intermediate hosts for A. costaricensis in the
endemic areas in Rio Grande do Sul, Brazil.

Keywords
Angiostrongylus costaricensis - abdominal angiostrongylosis - mollusc hosts - prevalence - parasitic burden

 
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