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The occurrence of the larval cestode Cysticercus fasciolaris in rodent populations from the Cuxtal ecological reserve, Yucatan, Mexico

Published online by Cambridge University Press:  06 January 2011

R.I. Rodríguez-Vivas ,
J.A. Panti-May ,
J. Parada-López ,
S.F. Hernández-Betancourt  and
H.A. Ruiz-Piña
R.I. Rodríguez-Vivas*
Affiliation:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 carretera Mérida-Xmatkuil, Mérida, Yucatán, México
J.A. Panti-May
Affiliation:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 carretera Mérida-Xmatkuil, Mérida, Yucatán, México
J. Parada-López
Affiliation:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 carretera Mérida-Xmatkuil, Mérida, Yucatán, México
S.F. Hernández-Betancourt
Affiliation:
Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Km 15.5 carretera Mérida-Xmatkuil, Mérida, Yucatán, México
H.A. Ruiz-Piña
Affiliation:
Centro de Investigaciones Regionales ‘Dr. Hideyo Noguchi’, Universidad Autónoma de Yucatán, Calle 59 x Av. Itzáes No. 490, CP 97000, Mérida, Yucatán, México
*
*Fax: (+52 999) 9423200 E-mail: [email protected]
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Abstract

Cysticercus fasciolaris is the larval stage of the cestode Taenia taeniaeformis, whose definitive hosts are mainly cats. This larval stage uses a wide variety of small rodents, and occasionally birds and humans, as intermediate hosts. In the Yucatan, there are no reports of the presence of this cestode in animal populations. The aim of this study was to evaluate the occurrence of C. fasciolaris in rodent populations from the Cuxtal ecological reserve, Yucatan, Mexico. Trapping of rodents was conducted from October 2009 to April 2010 in 40 households in Molas, in which Sherman traps were placed both inside and outside backyards. Rodents were dissected to inspect the liver for the presence of the worm. To determine risk factors associated with infection, univariate analysis was performed using sex, age, species, trapping site, and season as independent variables. Variables with a P value <  0.2 were analysed using a logistic regression model. In this study, 411 individuals of six rodent species were trapped; Mus musculus was the most abundant (78%), followed by Rattus rattus (13%) and the wild species Peromyscus yucatanicus, Ototylomys phyllotis,Heteromys gaumeri and Reithrodontomys gracilis (9%). Only 7.5% (n = 31) of M. musculus and R. rattus were infected with C. fasciolaris (demonstrated by the presence of liver cysts) with a prevalence of 9.0% and 3.5%, respectively. Both adults and male mice were 4.33 and 3.46 (OR values) times more likely to have C. fasciolaris than juveniles and females respectively. We can conclude that in the Cuxtal Reserve, Yucatan, Mexico, the prevalence of C. fasciolaris is higher in M. musculus, and that adult males had a higher probability of infection. Wild species, mainly P. yucatanicus, were not found to be infected with the cestode, but its presence in the backyards of households could result in a potential risk of acquiring this infection.

Type
Research Papers
Information
Journal of Helminthology , Volume 85 , Issue 4 , December 2011 , pp. 458 - 461
Copyright
Copyright © Cambridge University Press 2011

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