Comunicación Corta / Short Communication

P Peruvian journal
J
P of parasitology
Volumen 20- Número 2 - Año 2012
ISSN 2311-4533 (Electronic version)
Comunicación Corta / Short Communication
First record of the Echinococcus vogeli (Cestoda, Taeniidae)
metacestod in finding in Iquitos, Peru
Primer registro del metacestode de Echinococcus vogeli (Cestoda, Taeniidae)
en Iquitos Peru
Manuel Tantaleán V1, José Angulo T 2, Rosa Martínez R1, Silvana Díaz Mancilla3
1. Laboratorio de Parasitología en Fauna Silvestre y Zoonosis. Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos. Lima,
Perú. E-mail: [email protected]
2. Escuela de Posgrado. Facultad de Medicina Veterinaria. Universidad Nacional Mayor de San Marcos. Lima, Perú.
3. Instituto de Medicina Tropical “Alexander von Humboldt”. Universidad Peruana Cayetano Heredia. Lima, Perú.
Abstract
Resumen
We report for the first time, the finding of the
hydatid of Echinococcus vogeli in the liver of Agouti
paca in the city of Iquitos, Peru.
Se reporta, por primera vez, el hallazgo del hidátide
de Echinococcus vogeli en el hígado de Agouti paca en
la localidad de Iquitos, Perú.
Key words: Echinococcus vogeli | metacestode |
Agouti paca | Peru.
Palabras clave: Echinococcus vogeli | metacestodo|
Agouti paca, Perú.
Introduction
Material and Methods
H
Four livers of Agouti paca were obtained from the
Belen market in Iquitos (03°43'46''S
73°14'18''O), there were found polycistic
formations in one of them; protoscolices were
obtain from one of this for morphologic studies,
especially from the rostellar hooks and the others
were fixed in 10% formalin before being
processed for histological sections. 30 large and
small hooks were conveniently pressed under a
coverslip slide and then clarified in a mixture of
ethanol and phenol (2 parts of melted phenol by
1 of 50% ethanol) and measured at 1000x using a
calibrated ocular micrometer. The measures of
ydatidosis is a zoonotic disease due to
the hydatid of cestodes from the
Echinoccocus gender; within it,
Echinococcus vogeli is known to cause polycystic
hydatid disease and to be spread in the
neotropical region. In Peru, the infection is
known due to 1 human case in Contamana,
(1)
Loreto . The definitive host in the wild and
domestic cycle are the canine Speothos venaticus
(2)
and dog respectively , the intermediate host is a
rodent from the Agoutidae and Dasyproctidae
families, host that have never been found in Peru
before.
Citation:Tantaleán VM, Angulo TJ, Martínez RR, Díaz MS. First record of the Echinococcus vogeli (Cestoda, Taeniidae) metacestod in Cuniculus paca in the
Peruvian Amazon. Peruv j parasitol. 2012;20(2):e74-e77.
Open access peer-reviewed scientific journal published by the Asociación de Parasitólogos del Perú. Copyright ® 2012. All rights reserved.
74
Short communication
Tantaleàn et al. Echinococcus vogeli in the Peruvian Amazon.
Peruvian journal of parasitology
Volumen 20- Número 2 - Año 2012
ISSN 2311-4533 (Electronic version)
the hooks were recorded in microns, indicating
first the average and then the rank in
parenthesis.
the small hooks were 32,7 (31 – 36). On the
mayor hooks it was observed that the blade was
bigger than the handle and the eccentric guard
(Figs. 1 y 2). In table 1, the measurements of the
large and small hooks were recorded and
compared with the ones obtained from other
authors.
Results
The large hooks measurement was 41,1 (40-43),
Tabla 1. Measurements of the hooks of E. vogeli.
Rausch and
Bernstein,
1972 (11)
Authors
Gardner et Rodrigues Somocurcio Abdul-Hadi et This article
al., 1988 (6) et al., 2002 et al., 2004 al., 2007 (8)
(7)
(1)
Origin
Speothos
venaticus
(Ecuador)
Cuniculus
paca
(Bolivia)
Human
(Brazil)
Human
(Peru)
Human
(Venezuela)
Large hooks
0,053
(0,049-0,057)
39.83
(37- 44)
0,0372
40-45
41
41,1
(40-43)
Small hooks
0.043
(0,030-0,047)
32,59
(27-35)
28-35
33
32,7
(31-36)
-
Agouti paca
(Peru)
The hooks of the scolices and the polycystic formations were identified as belonging to
Echinococcus vogeli.
Figure 1. Large hook, Echinococcus vogeli.
Peruv. j. parasitol 2012; 20 (2)
Acceso gratuito en línea a texto completo.
Figure 2. Small hook, Echinococcus vogeli.
75
Short communication
Tantaleàn et al. Echinococcus vogeli in the Peruvian Amazon.
Peruvian journal of parasitology
Volumen 20- Número 2 - Año 2012
ISSN 2311-4533 (Electronic version)
Discussion
contact with wild animals; however, the larval
stadium was not found yet in the natural
intermediate host.
E vogeli is consider to be the most pathogenic
(4)
among all the Echinococcus species .
Currently, polycystic echinococcocis produced
by E. vogeli is consider to be an emergent disease
(10)
.
Neotropical species of Echinococcus, E. oligarthrus
and E. vogeli, can be differentiated by the shape
and length of rostellar hooks, where the hooks
from E. vogeli are the ones with larger dimensions
(3)
. So far it does not exists a single report of E.
oligarthrus in Peru, but it exists in other South
American countries(4). In the domestic biological
cycle of E. vogeli, the dog plays an important role
for human infection (4, 5). Polycystic formations
found at A. paca liver and the protoscolices
hooks characteristics like the length and the
blade larger than the handle, allowed us to
identify them as part of Echinococcus vogeli; this
characteristics coincide with the ones registered
by other authors (table 1) (1, 6. 7, 8, 11). E. granulosus is
the best known species in our country, its
hydatids larvae affects humans and ruminants,
(9)
especially at the Andean livestock area , but its
rostellar hooks have smaller measurements that
(3)
the ones from other South American species .
(1)
In Peru, Somocurcio et al. presented the first
case of polycystic echinococcocis produced by E.
vogeli in a 44 year-old patient that have had
Conclusions:
It is concluded that it is the first time that the
larval stadium of E. vogeli has been found in
Agouti paca in Peru.
Autor’s contribution::
MTV, Designed the study, analysed the results
and wrote the paper. JAT, parasites collection
and comments and suggestions. RMR, prepared
the samples and technical assistence. SDM,
study and drafted the manuscript.
Conflict of Interest: The authors declare
none.
Funding:None.
References
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76
Short communication
Tantaleàn et al. Echinococcus vogeli in the Peruvian Amazon.
Peruvian journal of parasitology
Volumen 20- Número 2 - Año 2012
ISSN 2311-4533 (Electronic version)
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Correspondence: Dr. Manuel Tantaleán V, Laboratorio de Parasitología en Fauna Silvestre y Zoonosis. Facultad de Ciencias Biológicas,
Universidad Nacional Mayor de San Marcos. Lima, Perú. E-mail: [email protected]
Peruv. j. parasitol 2012; 20 (2)
Acceso gratuito en línea a texto completo.
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