Didelphis albiventris is also broadly distributed in eastern Bolivia (Cerqueira ). Sympatry with D. aurita and D. marsupialis, although rare (Cerqueira ). Didelphis albiventris Lund, (Download Help) Didelphis albiventris TSN Genus, Didelphis Linnaeus, – large American opossums. AnAge entry for Didelphis albiventris. Classification (HAGRID: ) Genus: Didelphis; Species: Didelphis albiventris; Common name: White-eared opossum .

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We investigated the occurrence of Leishmania infantum chagasi in Didelphis albiventris opossums at a wild animal rehabilitation center in the city of Campo Grande, Brazil. A total of 54 opossums were tested for L. The samples were analyzed by direct examination, culturing in a specific medium, and polymerase chain didlphis fragment length polymorphism.

White-eared opossum

A total of These results suggest a role for D. Leishmaniasis is a disease caused by protozoa. A large number of Leishmania species have been characterized as parasites of wild animals and are less frequently found in domesticated animals.

There is evidence that the presence of opossums in the same area as canine transmission is a predisposing factor for canine infection, although the albiventrie of these animals as reservoirs didslphis their impact on the transmission of L.

Nonetheless, opossums are usually found in urban areas. For cases of human VL, the Campo Grande Secretary of Health classifies different regions of the city as sporadic transmission zones, moderate transmission zones, aalbiventris transmission zones, and zones without transmission. Didelphis albiventris were captured in different areas of the city, kept at a wild animal rehabilitation center, and screened for L.

Animals were defined as being in good health on the basis of physical examination at arrival. A microchip was implanted in all animals after species identification and clinical screening.

Samples from opossums were typically collected within 1—2 days of arrival at the center; the maximum interval between arrival and collection procedures was three days.

Samples were microscopically examined for Leishmania aalbiventris and were inoculated in Neal, Novy and Nicolle medium and Schneider’s medium. A polymerase chain reaction was designed to amplify a basepair fragment of the internal transcribed spacer 1 of ribosomal RNA of Leishmania spp.


Restriction fragment length polymorphism analyses were conducted as described. A total of 54 white-eared opossums were screened for L. All animals exhibited good health and no symptoms of VL at the time of clinical screening. Seven of 21 blood marrow samples and 4 of 33 peripheral blood samples were positive for Leishmania spp. Amastigote forms were found in peripheral blood samples from two animals, but isolation in culture media was not possible.

Restriction fragment length polymorphism analysis identified the parasites from bone marrow and peripheral blood samples as Leishmania i. Restriction fragment length polymorphism pattern of internal transcribed spacer 1 region polymerase chain reaction products in bone marrow lanes 1 and 2 and peripheral blood lane 3 samples positive for Leishmaniai.

The distribution of the animals among the VL transmission zones and number of opossums positive or negative for L. The distribution of animals positive for L.


Most wild animals considered to be reservoir species for Leishmania spp. The larger number of infected adult opossums 10 adults versus 1 juvenile suggests that these animals likely become infected over time because of living in close contact with human populations and, consequently, infected dogs. Moreover, opossums expand their area of dispersion as they get older. The city of Campo Grande has a large number of wooded areas, which accounts for the presence of opossums near human households.

In addition, forest degradation caused by urban development may expel opossums from their natural habitat and force these animals to seek shelter in domestic environments.

Another peculiarity that supports this synanthropic behavior is the habit among the local human population of turning their backyards into rural areas by breeding animals, such as chickens and pigs, and maintaining a variety of fruit trees. These conditions also contribute to proliferation and maintenance of vectors. Lutzomyia longipalpis is known to be distributed throughout the city of Campo Grande. Currently, data on opossum population size in the Campo Grande area is insufficient to enable accurate estimation of population size and, subsequently, ideal sample size.

The sample size used here was based on the number of opossums that were brought to the wild animal rehabilitation center during the course of the study. In a study carried out in the city of Jacobina Bahia State, Brazilit was found that 2. This mammal was also found naturally infected with other species of Leishmania L.


Other studies report Didelphis marsupialis infected with L.

Likewise, the absence of infected opossums coincided with areas without human cases of the disease. According to Santiago and others, 6 high infection rates in opossums in an urban area suggest that this species may act as a natural link in the domestic and sylvatic parasite life cycle because opossums and albiventrsi can inhabit the same environment.

The sampling method we used was convenience sampling of all opossums brought to the wild animal rehabilitation center during the study. However, the prevalence within our sample of 11 opossums Thus, the presence of L.

Ribolla and Diego P. Bonamigo and Norton Tasso, Jr. National Center for Biotechnology InformationU. Am J Trop Med Hyg. HumbergElisa T. RibollaDiego P. AlonsoAlda M. FerreiraRaquel A.

BonamigoNorton Tasso, Jr. Author information Article notes Copyright and License information Disclaimer. Received Aug 17; Accepted Mar This article has been cited by other articles in PMC. Abstract We investigated the occurrence of Leishmania infantum chagasi slbiventris Didelphis albiventris opossums at a wild animal rehabilitation center in the city of Campo Grande, Brazil. Open in a separate window.

VL didelphos zones Results No. VL transmission zones No. Ecological interactions in the transmission of the leishmaniases.

Comadreja overa (Didelphis albiventris)

Rev Soc Bras Med Trop. An investigation didelphiw Leishmania spp. Didelphis marsupialis common opossum: PCR diagnosis and characterization of Leishmania in local and imported clinical samples. Diagn Microbiol Infect Dis. Didelphis marsupialisan apparent wild reservoir of Leishmania donovani chagasi in Colombia, South America.

Didelphis marsupialisan important reservoir of Trypanosoma Schizotrypanum cruzi and Leishmania Leishmania chagasi in Colombia. Os Marsupiais do Brasil: Mem Inst Oswaldo Cruz. Wild and synanthropic hosts of Leishmania Viannia braziliensis in the endemic cutaneous leishmaniasis locality of Amaraji, Pernambuco State, Brazil.

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