Atividade enzimática no solo e dinâmica de carbono e nitrogênio em pastos de capim-tanzânia sob índices de área foliar residual

Pós-graduação em Zootecnia - FCAV

Caracterização epidemiológica de brucelose e leptospirose de pequenos ruminantes dos estados do Sergipe, Bahia, Ceará e Paraíba

Pós-graduação em Medicina Veterinária - FCAV

Morfologia do estômago do cervo-do-pantanal (Blastocerus dichotomus, Illiger 1815)

Based on the lack of information regarding the morphology of marsh deer, this work aims to describe some morphological aspects of the gastric chamber in this species, collaborating with future investigations, mainly related to rational handling in this cervid. This work aimed to describe the morphology of the gastric chamber of the marsh deer, characterizing the external and internal macroscopical details and the microscopical architecture of these structures by light microscopy. Macroscopically, the marsh deer stomach is formed by the rumen, reticulum, omasum and abomasum similar to the domestic ruminants. Microscopically, rumen and abomasum are similar to the domestic ruminants. The reticulum and the omasum, however, present specific characteristics such as keratin on the top of the reticulum, small epithelial projections and omasum folds covered with discrete papillae.

Mutações putativo-causais em genes candidatos associadas à fertilidade de bovinos de corte e bubalinos

Pós-graduação em Genética e Melhoramento Animal - FCAV

Host-specificity and morphometrics of female Haemonchus contortus, H. placei and H. similis (Nematoda: Trichostrongylidae) in cattle and sheep from shared pastures in Sao Paulo State, Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Polymorphisms in Oxytocin and alpha(1a) Adrenergic Receptor Genes and Their Effects on Production Traits in Dairy Buffaloes

The use of molecular markers may auxiliary the buffalo breeding. The oxytocin (OXT) and the adrenergic receptor alpha(1A) (ADRA1A) may be involved in milk ejection in ruminants. The aim of this study was to verify the existence of polymorphisms in the OXT and ADRA1A genes and their associations with milk production traits. A total of 220 buffaloes were genotyped using PCR-RFLP for both genes. The SNP identified in the ADRA1A gene was associated with protein percentage in dairy buffaloes. This is the first report of such association in the literature, which has not been studied in other species.

Use of probiotics to reduce faecal shedding of Shiga toxin-producing Escherichia coli in sheep

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Alterações ultrassonográficas renais e vesicais de ovinos confinados e suplementados com cloreto de amônio

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Differentiation of Haemonchus placei from Haemonchus contortus by PCR and by morphometrics of adult parasites and third stage larvae

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Investigation of a new acetogen isolated from an enrichment of the tammar wallaby forestomach

Background: Forestomach fermentation in Australian marsupials such as wallabies and kangaroos, though analogous to rumen fermentation, results in lower methane emissions. Insights into hydrogenotrophy in these systems could help in devising strategies to reduce ruminal methanogenesis. Reductive acetogenesis may be a significant hydrogen sink in these systems and previous molecular analyses have revealed a novel diversity of putative acetogens in the tammar wallaby forestomach.Results: Methanogen-inhibited enrichment cultures prepared from tammar wallaby forestomach contents consumed hydrogen and produced primarily acetate. Functional gene (formyltetrahydrofolate synthetase and acetyl-CoA synthase) analyses revealed a restricted diversity of Clostridiales species as the putative acetogens in the cultures. A new acetogen (growth on H-2/CO2 with acetate as primary end product) designated isolate TWA4, was obtained from the cultures. Isolate TWA4 classified within the Lachnospiraceae and demonstrated > 97% rrs identity to previously isolated kangaroo acetogens. Isolate TWA4 was a potent hydrogenotroph and demonstrated excellent mixotrophic growth (concomitant consumption of hydrogen during heterotrophic growth) with glycerol. Mixotrophic growth of isolate TWA4 on glycerol resulted in increased cell densities and acetate production compared to autotrophic growth. Co-cultures with an autotrophic methanogen Methanobrevibacter smithii revealed that isolate TWA4 performed reductive acetogenesis under high hydrogen concentration (> 5 mM), but not at low concentrations. Under heterotrophic growth conditions, isolate TWA4 did not significantly stimulate methanogenesis in a co-culture with M. smithii contrary to the expectation for organisms growing fermentatively.Conclusions: The unique properties of tammar wallaby acetogens might be contributing factors to reduced methanogen numbers and methane emissions from tammar wallaby forestomach fermentation, compared to ruminal fermentation. The macropod forestomach may be a useful source of acetogens for future strategies to reduce methane emissions from ruminants, particularly if these strategies also include some level of methane suppression and/or acetogen stimulation, for example by harnessing mixotrophic growth capabilities

Vaccination of sheep and cattle against haemonchosis

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Tick-borne agents in domesticated and stray cats from the city of Campo Grande, state of Mato Grosso do Sul, midwestern Brazil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estudo neuroanatômico do éncefalo bovino por ressonância magnética

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudos fitoquímicos e avaliação do potencial anti-helmíntico da opuntia ficus-indica

Pós-graduação em Ciência dos Materiais - FEIS

Histologia e histomorfometria do retículo de bovino no período pré-natal

The development of the stomach of ruminants requires further studies because it is a complex process. Therefore, was analyzed the histology and histomorphometry of reticulum at each gestation period. Samples of Nelore fetuses (Bos taurus indicus) was divided in 5 groups: 1 - fetuses at 9 to 15 weeks (8 to 21cm) of gestation, 2 - fetuses at 16 to 22 weeks (23 to 37cm) 3 - fetuses at 23 to 29 weeks (40 to 58cm), 4 - fetuses at 30 to 36 weeks (61 to 77cm) and 5 - fetuses at 37-43 weeks (79 to 88cm). The histological sections were stained with hematoxylin and eosin and Mallory's trichrome and examined by light microscopy. In group 1, the fetuses with 11 cm, showed mucosal projections that eventually become primary crests, lamina propria and submucosa are fused and external and internal muscular and similar. At 16.5 inches, the primary crests had lamina propria and at 18.5 cm, appeared connections between the ridges. In group 2, at 31 cm started epithelial involvement around the crests. In group 3, the fetuses of 42 cm revealed the first secondary papillae and muscular mucosa in the upper portion of the primary crests. Thereafter, it was increased epithelial due to its positioning around the crests, thickening of the lamina propriasubmucosa, muscular layer, especially the internal muscular and serosa. It was concluded that the most visible changes occur in fetuses belonging to the first 3 groups, measurements for the epithelium, muscle layer and total wall were increasing and the other analyzed layers showed variations during fetal development.