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Pathology of enteric infections induced by the acanthocephalan Profilicollis chasmagnathi in Olrog's gull, Larus atlanticus, from Argentina

Published online by Cambridge University Press:  19 December 2011

L.F. La Sala ,
A.M. Perez ,
J.E. Smits  and
S.R. Martorelli
L.F. La Sala*
Affiliation:
Centro de Estudios Parasitológicos y de Vectores (CONICET), La Plata, (1900), Argentina
A.M. Perez
Affiliation:
Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Center for Animal Diseases Modeling and Surveillance (CADMS), Davis, CA95616, USA, and CONICET – Facultad de Ciencias Veterinarias UNR, Boulevard Ovidio Lagos y Ruta 33, 2170, Casilda, Santa Fe, Argentina
J.E. Smits
Affiliation:
Faculty of Veterinary Medicine, Department of Ecosystem and Public Health, University of Calgary, TRW 2D01, Calgary, AB, Canada
S.R. Martorelli
Affiliation:
Centro de Estudios Parasitológicos y de Vectores (CONICET), La Plata, (1900), Argentina
*
* E-mails: lucianolasala@yahoo.com.ar; lucianolasala@conicet.gov.ar
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Abstract

Acanthocephalans can be pathogenic helminths of marine birds. Every year during the breeding season, there is variable mortality among prefledged chicks from the largest known Olrog's gull (Larus atlanticus) colony. Mortality has been associated with infection by the acanthocephalan Profilicollis chasmagnathi. Our aim was to study the role of chicks' size as a risk factor for intensity of infection and severe pathology, and to expand upon previous pathological findings reported in acanthocephalan-infected chicks. Size of the chick was associated with intensity of infection and number of intestinal perforations, which increased by 6.9% and 4.1%, respectively, for each millimetre increment in chick size. Infection was associated with inflammatory enteritis and granulomatous peritonitis. Complete intestinal perforations were observed in 85% and 97.3% of the studied chicks in 2005 and 2006, respectively, and they were observed very early during the post-hatching period. Our results show: (1) the presence of advanced pathology associated with acanthocephalan infections in chicks, beginning very early in the post-hatching period; and (2) significant increases in the intensity of infection and the associated pathology as a function of size of chicks, in dead chicks during this period.

Type
Research Papers
Information
Journal of Helminthology , Volume 87 , Issue 1 , March 2013 , pp. 17 - 23
Copyright
Copyright © Cambridge University Press 2011

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