Parasites of the squirrelSciurus spadiceus(Rodentia: Sciuridae) from Amazonian Brasil, with particular reference toEimeria damnosan. sp. (Apicomplexa: Eimeriidae)

Lainson, Ralph; Brigido, M.C.O.; Sílveira, Fernando Tobias

doi:10.1051/parasite/2005124305

Cited by 7 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, Lainson et al. ). Notosciurus granatensis is a host of Leishmania equatorensis (Grimaldi Júnior et al.…”

Section: Resultsmentioning

confidence: 99%

“…(Lainson et al. ). The mosquito species Lutzomyia evansi , a vector of Leishmaniosis, was reported to feed on Notosciurus granatensis in northern Colombia (Adler et al.…”

Section: Resultsmentioning

confidence: 99%

“…We found 24 records (18%) of 12 unicellular parasite forms in the literature; there was a heavy bias towards taxa with zoonotic potential. At least four squirrel species (Guerlinguetus brasiliensis, Hadrosciurus igniventris, Hadrosciurus spadiceus and Notosciurus granatensis) are the hosts of at least three species of trypanosomes (Trypanosoma cruzi, Trypanosoma lewis, and Trypanosoma rangeli; Perruolo 1974, Revollo et al 1998, Lainson et al 2005. Notosciurus granatensis is a host of Leishmania equatorensis (Grimaldi Júnior et al 1992) and Endotrypanum sp.…”

Section: Parasitic Interactionsmentioning

confidence: 99%

“…(Katakura et al 2003), whereas Hadrosciurus spadiceus is a host of Giardia sp. (Lainson et al 2005). The mosquito species Lutzomyia evansi, a vector of Leishmaniosis, was reported to feed on Notosciurus granatensis in northern Colombia (Adler et al 2003).…”

Section: Parasitic Interactionsmentioning

confidence: 99%

See 3 more Smart Citations

NEOSQUIRREL: a data set of ecological knowledge on Neotropical squirrels

2019

View full text Add to dashboard Cite

The squirrels (Sciuridae), with 292 species, make up the second most diverse family of rodents. Squirrels play important roles as seed and spore dispersers and seed predators in all regions where they occur. In Neotropical regions, around 28 species of squirrel are recognised. However, our knowledge of the ecology of the Neotropical Sciuridae is severely incomplete, lacking in the most basic ecological information for most species. We reviewed the literature in English, Spanish, and Portuguese, for all squirrel species in the Neotropical biogeographic region, summarising ecological interactions between squirrels and the local biota, population density records, the number of publications, and the distribution of study sites. We found information for 20 squirrel species (71% of the recognised species), from 15 countries, in 48 publications containing 126 population density records and 155 publications containing 649 ecological interactions. The most studied species were Guerlinguetus brasiliensis, Notosciurus granatensis, and Sciurus variegatoides, with 53% of all publications, whereas for eight species of Microsciurus, we found no publications. The density of Neotropical squirrels varied from 0.08 to 100 individuals per km2 and was negatively correlated with forest area. Neotropical squirrels were recorded eating 174 plant taxa, five fungus taxa, four invertebrate taxa, and one species of vertebrate. Palms were common in the diet of squirrels (30 palm species, 27% of feeding records). Squirrels cached 28 plant species, of which 15 were palms. Sixty‐five taxa of parasites are documented to occur in Neotropical squirrels, and the most common were Enderleinellus lice. Zoonotic parasites, including trypanosomes, Leptospira spp., Leishmania spp., and plague were also reported. Our review reveals the main information gaps in the current knowledge about the ecology of Neotropical Sciuridae and maps the geographic distribution of the available information throughout South and Central America. Squirrels often thrive in small forest fragments and fulfil important roles as seed dispersers and prey for mesopredators.

show abstract

“…, Lainson et al. ). Notosciurus granatensis is a host of Leishmania equatorensis (Grimaldi Júnior et al.…”

Section: Resultsmentioning

confidence: 99%

“…(Lainson et al. ). The mosquito species Lutzomyia evansi , a vector of Leishmaniosis, was reported to feed on Notosciurus granatensis in northern Colombia (Adler et al.…”

Section: Resultsmentioning

confidence: 99%

Section: Parasitic Interactionsmentioning

confidence: 99%

Section: Parasitic Interactionsmentioning

confidence: 99%

See 2 more Smart Citations

NEOSQUIRREL: a data set of ecological knowledge on Neotropical squirrels

2019

View full text Add to dashboard Cite

show abstract

“…In this respect it is notable that although there is usually a consistent and moderate size range for the oocysts of a given species, there are instances when there may be a very great variation in either the length or width. The mature oocysts of E. damnosa of the squirrel Sciurus spadiceus, for example, range from 18.0 × 15.0 -40.2 × 30.0 (Lainson et al 2005). In addition, there may be striking differences in the structure of the wall of the oocysts of a given species in the same host.…”

Section: Discussionmentioning

confidence: 99%

<![CDATA[Observations on Eimeria species of Dasyprocta leporina (Linnaeus, 1758)(Rodentia: Dasyproctidae) from the state of Par�, North Brazil]]>

Lainson¹,

Carneiro²,

Sílveira³

2007

Mem. Inst. Oswaldo Cruz

View full text Add to dashboard Cite

Redescriptions are given of the mature oocysts of Eimeria aguti Carini 1935, E. cotiae Carini, 1935 and E. paraensis Carini, 1935 Following the examination of faeces from a single specimen of an agouti, which he referred to as "Cotia vermelha (Aguti aguti)", Carini (1935) described the mature oocysts of what he considered to be three distinct species of Eimeria, and named them E. paraensis, E. cotiae, and E. aguti. Pellérdy (1974) pointed out that the genus "Cotia" does not exist within the Class Mammalia and listed the host of these parasites as Dasyprocta aguti. This was corrected by Levine and Ivens (1990) to Dasyprocta leporina (Linnaeus, 1758), for which D. aguti is now considered to be a synonym (Hussan 1978). The animal was housed in the Parque Zoobotânico of the Museu Emilio Goeldi, in Belém, Pará, North Brazil, and although the exact locality of its origin was not given, it was most likely to have been somewhere in Pará.We have examined the faeces of 10 D. leporina, identified to species by cytogenic analysis, from two different areas of Pará: five of them were passing oocysts of Eimeria species which superficially resembled those described in D. leporina by Carini. In this communication we give re-descriptions of the mature oocysts of E. aguti and those previously described as E. paraensis and E. cotiae (Carini 1935): some endogenous stages, regarded as those of E. cotiae, are described in the ileum. Doubts are raised regarding separation of this parasite and E. paraensis. MATERIALS AND METHODSThe agoutis were captured in fruit and vegetable-baited traps. Eight of the animals were from the municipality of Anajás, Island of Marajó, Pará (0.59 S : 49.57 W) and two from the Island of Caratateua (more popularly known as Outero), municipality of Belém, Pará (1.18 S : 48.28 W): they were maintained, in separate cages, on a diet of mixed fruit and vegetables and given water ad libitum. Faecal samples were obtained daily, lightly triturated in 2% aqueous potassium dichromate solution (K 2 Cr 2 O 7 ), kept at approximately 24ºC as thin layers in loosely covered Petri dishes, and examined for the presence of coccidial oocysts by both direct microscopical examination and the zinc sulphate flotation method (Baker 1969). Positive samples were examined daily to determine the time required for oocyst sporulation.In an attempt to locate the site of development of the parasites in D. leporina, two of the naturally infected animals were sacrificed, and a search made for endogenous stages in both the gall-bladder and intestinal epithelium. The entire alimentary tract was fixed in 10% buffered formalin for subsequent preparation of histological sections of the duodenum, ileum, caecum, and colon. Oocysts and sporocysts were measured using a x 100 neofluar objective and x 10 eyepieces with an ocular micrometer. Photomicrographs were prepared with a Zeiss "Photomicroscope III" and Kodak TMX 100 film. All measurements are given in µm and presented as means, with the range in parentheses, followed by the shape-index (ratio o...

show abstract