Time filter

Source Type

Calvete J.J.,Institute Biomedicina Of Valencia | Sanz L.,Institute Biomedicina Of Valencia | Perez A.,Institute Biomedicina Of Valencia | Borges A.,Central University of Venezuela | And 8 more authors.
Journal of Proteomics | Year: 2011

We describe two geographically differentiated venom phenotypes across the wide distribution range of Bothrops atrox, from the Colombian Magdalena Medio Valley through Puerto Ayacucho and El Paují, in the Venezuelan States of Amazonas and Orinoquia, respectively, and São Bento in the Brazilian State of Maranhão. Colombian and Venezuelan venoms show an ontogenetic toxin profile phenotype whereas Brazilian venoms exhibit paedomorphic phenotypes. Venoms from each of the 16 localities sampled contain both population-specific toxins and proteins shared by neighboring B. atrox populations. Mapping the molecular similarity between conspecific populations onto a physical map of B. atrox range provides clues for tracing dispersal routes that account for the current biogeographic distribution of the species. The proteomic pattern is consistent with a model of southeast and southwest dispersal and allopatric fragmentation northern of the Amazon Basin, and trans-Amazonian expansion through the Andean Corridor and across the Amazon river between Monte Alegre and Santarém. An antivenomic approach applied to assess the efficacy towards B. atrox venoms of two antivenoms raised in Costa Rica and Brazil using Bothrops venoms different than B. atrox in the immunization mixtures showed that both antivenoms immunodepleted very efficiently the major toxins (PIII-SVMPs, serine proteinases, CRISP, LAO) of paedomorphic venoms from Puerto Ayacucho (Venezuelan Amazonia) through São Bento, but had impaired reactivity towards PLA 2 and P-I SVMP molecules abundantly present in ontogenetic venoms. The degree of immunodepletion achieved suggests that each of these antivenoms may be effective against envenomations by paedomorphic, and some ontogenetic, B. atrox venoms. © 2010 Elsevier B.V. Source

Perez R.,Federal University of Rio Grande do Sul | Ribeiro S.,Faculdades Integradas Do Tapajos | Borges-Martins M.,Federal University of Rio Grande do Sul
Zootaxa | Year: 2012

We revised the taxonomic status of Amphisbaena prunicolor and A. albocingulata, two taxa traditionally recognized as subspecies of A. prunicolor in the A. darwini complex. Despite some authors elevated both taxa to the specific rank, its taxonomic decisions were made without specific commentaries and/or proper diagnostic characters. The comparison of morphological characters between the two taxa with other similar species, associated with A. darwini (A. darwini, A. heterozonata, A. munoai and A. trachura), revealed a unique combination of diagnostic characters. Amphisbaena pruni-color and A. albocingulata were considered distinct species, diagnosable by the presence of the postmalar row in A. prunicolor, absent in A. albocingulata and by the ventral colour pattern uniform (pale brown) in A. albocingulata and checkerboard (brown-purplish and white) in A. prunicolor. We also provided a redescription of the two species, information on intraspecific variation in A. munoai and suggested the extension of the distribution of A. darwini to southern Brazil. Copyright © 2012 Magnolia Press. Source

Minervino A.H.H.,University of Sao Paulo | Soares H.S.,University of Sao Paulo | Barreto-Junior R.A.,Rural University | Neves K.A.L.,Faculdades Integradas Do Tapajos | And 4 more authors.
Journal of Zoo and Wildlife Medicine | Year: 2010

In this study, serum samples of 203 animals from different locations, from zoos and breeding facilities from the north and northeast regions of Brazil, were analyzed for the presence of anti-Toxoplasma gondii antibodies by the modified agglutination test (MAT) with a cutoff of 125. Of the sampled animals, 184 were adult mammals of both sexes and 19 were birds. Antibodies were found in 61 of 184 mammals, and no association between sex and age of the animals and the presence of T. gondii antibodies was observed (P < 0.05). Anti-T. gondii antibodies were not found in birds. Toxoplasma gondii was detected in Brazilian tapir (Tapirus terrestris) for the first time. Copyright 2010 by American Association of Zoo Veterinarians. Source

Silva A.M.,State University of Ceara | Oliveira C.H.D.A.,State University of Ceara | Fernandes C.C.L.,State University of Ceara | Silva L.M.,Faculdades Integradas Do Tapajos | And 5 more authors.
Semina:Ciencias Agrarias | Year: 2015

The present study evaluates the use of dried carnauba wax palm fruit in 28 postpartum goats fed diets containing Bermudagrass hay and either corn (WCWP) or carnauba-based (CWP) concentrated feed. Estrus synchronization was performed 90 days postpartum, and the goats were mated. In the CWP group, compared to the WCWP group, the daily dry matter intake was significantly reduced (646.48 ± 11.03 g vs. 739.29 ± 3.24 g, respectively; P < 0.01). The time to the first functional corpus luteum was similar between the groups, occurring a mean 66 days postpartum. During estrus synchronization, the CWP group had a decreased sternal subcutaneous adipose tissue thickness when compared to the WCWP group (11.93 ± 0.45 mm vs. 13.69 ± 0.57 mm, respectively; P < 0.05) and a lower pregnancy rate (86.67% vs. 46.15%, respectively; P < 0.02). The embryonic vesicle and crown-rump length growth rates, and the biparietal, thoracic, and abdominal diameters at 45 days of pregnancy were within normal range for goats in both groups. Litter size at birth was similar between the groups at a mean 1.39 ± 0.11. In conclusion, the substitution of corn with dehydrated carnauba wax palm fruit in concentrated feed for postpartum goats showed no positive effects. Reduced feed intake in the does consuming the carnauba diet caused decreased body reserves, which probably resulted in a decreased pregnancy rate in the affected does. Source

Discover hidden collaborations