detection of leishmania (leishmania) amazonensis and leishmania (leishmania) infantum chagasi in brazilian bats.although bats are one of the most abundant mammals in the new world and are present in virtually all ecosystems, including urban and peri-urban environments, few studies have investigated the role of these animals in the epidemiological chain of leishmaniosis. here, we report a study of 683 bats captured in são paulo county (southeastern from brazil), which were screened by serology, parasitologic methods and polymerase chain reaction (pcr) for trypanosomatids. the indirect immunofluorescent ant ...201019939568
lipophosphoglycans from leishmania amazonensis strains display immunomodulatory properties via tlr4 and do not affect sand fly infection.the immunomodulatory properties of lipophosphoglycans (lpg) from new world species of leishmania have been assessed in leishmania infantum and leishmania braziliensis, the causative agents of visceral and cutaneous leishmaniasis, respectively. this glycoconjugate is highly polymorphic among species with variation in sugars that branch off the conserved gal(β1,4)man(α1)-po4 backbone of repeat units. here, the immunomodulatory activity of lpgs from leishmania amazonensis, the causative agent of di ...201627508930
trypanosoma cruzi and leishmania infantum chagasi infection in wild mammals from maranhão state, brazil.trypanosoma and leishmania are obligate parasites that cause important diseases in human and domestic animals. wild mammals are the natural reservoirs of these parasites, which are transmitted by hematophagous arthropods. the present study aimed to detect the natural occurrence of trypanosomatids through serological diagnosis, pcr of whole blood and blood culture (hemoculture), and phylogenetic relationships using small subunit ribosomal dna (ssu rdna), cytochrome b, and glycosomal glyceraldehyd ...201526501369
low infectiousness of a wildlife host of leishmania infantum: the crab-eating fox is not important for transmission.the epidemiological role of the crab-eating fox cerdocyon thous in the transmission of leishmania infantum is assessed in a longitudinal study in amazon brazil. a total of 37 wild-caught foxes were immunologically and clinically monitored, and 26 foxes exposed to laboratory colonies of the sandfly vector lutzomyia longipalpis, over a 15-month period. in total 78% (29/37) of foxes were seropositive for anti-leishmania igg on at least 1 occasion, and 38% (8/37) had infections confirmed by pcr and/ ...200212458824
comparative analysis of carbohydrate residues in the midgut of phlebotomines (diptera: psychodidae) from colony and field populations from amazon, brazil.leishmaniasis are worldwide diseases that occur in 98 countries including brazil, transmitted by the bite of female phlebotomines during blood feeding. in brazil it is known that some species of sand flies as lutzomyia longipalpis sensun latum (vector of leishmania infantum chagasi), lutzomyia flaviscutellata (vector of leishmania (leishmania) amazonensis) and lutzomyia antunesi [suspected vector of leishmania (viannia) lindenbergi] are incriminated of transmitting the parasite leishmania for th ...201627264642
leishmania infection and blood food sources of phlebotomines in an area of brazil endemic for visceral and tegumentary leishmaniasis.the aims of the study were to determine the blood feeding preferences of sandflies and to identify species of leishmania that infected phlebotomines in caxias, maranhão, brazil, an area that is highly endemic for leishmaniasis. sandflies were captured in light traps located in the peridomiciliary environments of randomly selected houses in urban and rural settings between 1800 and 0600 hours on new moon days between march 2013 and february 2015. dna extracts from 982 engorged female sandflies we ...201728837565
first record of lutzomyia (lutzomyia) longipalpis (diptera: psychodidae: phlebotominae) on the trinational frontier (brazil-peru-bolivia) of south-western south america, the main sand fly species involved in the transmission of leishmania infantum chagasi (cunha & chagas, 1937), etiological agent of the visceral leishmaniasis (vl), is lutzomyia longipalpis (lutz & neiva, 1912). the species has been recorded in colombia, venezuela, bolivia, argentina, paraguay, uruguay, and brazil, where it is recorded in 24 of the 27 brazilian states, except acre, amazonas, and santa catarina. collections were carried out for one year (april 2013 to march 2014) ...201728453779
mixed infection in the anteater tamandua tetradactyla (mammalia: pilosa) from pará state, brazil: trypanosoma cruzi, t. rangeli and leishmania infantum.some trypanosoma and leishmania species are multi-host parasites whose distribution overlaps in several parts of the brazilian amazon basin. despite being a common trait among wild mammals, mixed infections and their consequences for the host's health and parasite transmission are still a poorly known phenomenon. here we describe a triple mixed infection - trypanosoma cruzi, t. rangeli and leishmania infantum - in a bone marrow sample from an anteater tamandua tetradactyla captured in a house ba ...201323253893
Displaying items 1 - 8 of 8