Ministry of Agriculture

About: Ministry of Agriculture is a government organization based out in Rio de Janeiro, Brazil. It is known for research contribution in the topics: Chemistry & Salmonella. The organization has 1153 authors who have published 1189 publications receiving 14442 citations.

Experimental transmission of bovine leukosis virus by leucocytes recovered from the stable fly Stomoxys calcitrans L.

Abstract: 1. Wild stable flies (Stomoxys calcitrans) feeding on heifers infected with bovine leukosis virus (BLV) carried viable bovine leucocytes in the midgut and proboscis that, when inoculated by the subcutaneous route into lambs aged 5 to 60 days, elicited the development of antibodies to glycoprotein (gp51) and polypeptide 25 (p25). 2. Antibodies were detected as early as one month later and persisted for an experimental period of 24 or 36 months. Uninoculated control lambs reared together with the experimental animals did not acquire the infection, indicating the lack of horizontal transmission. 3. S. calcitrans reared in the laboratory were intermittently allowed to feed on the skin of BLV-infected heifers and on five lambs over a period of 3-10 months. Although some of these lambs were bitten about 500 times, none developed antibodies to BLV (gp51 or p25) over observation periods of 30 or 36 months.

Padrões de crescimento econômico dos municípios do MATOPIBA

Abstract: Resumo: Este artigo objetiva classificar os municipios do MATOPIBA com base em um conjunto de variaveis socioeconomicas, com destaque para as caracteristicas agricolas. Alem disso, propoe-se a decompor o crescimento do VAB setorial no periodo 2010-2015, no sentido de identificar grupos de municipios com vantagens competitivas e de especializacao. Para tanto, foram utilizadas conjuntamente a analise de cluster e o shift-share com base em informacoes do IBGE, RAIS e PNUD. A aplicacao do shift-share foi realizada com base nos grupos formados pela analise de cluster, o que permite maior integracao dos metodos. Os principais resultados mostram a formacao de cinco grupos, sendo apenas um deles considerado incipiente do ponto de vista do dinamismo da agropecuaria. Os resultados do shift-share apontam que esse grupo considerado incipiente foi o unico a apresentar VLT negativa e nao apresentar vantagem competitiva nem ser especializado na agropecuaria.

Phosphorus availability of rock phosphates as compared with feed-grade phosphates for swine

Abstract: One hundred ninety two swine were used in a trial to assess the relative bioavailability of phosphorus (RBP) in six phosphate sources. Phosphates were three feed grade phosphates (FP), two made in Brasil, and one USA made, and three rock phosphate samples (RP) originated from two mines sites in Brasil, and one mine site in Israel. Levels of calcium, phosphorus and fluorine in RP were 29, 12 and 1.7% (RP source 1), 33, 14 and 1.4% (RP source 2), and 30, 14 and 3.6% (RP source 3), respectively. Pigs were fed a corn-soybean meal basal diet (18% CP, 0.95% Lys, 0.75% Ca, 0.37% P) or the basal diet with 0.15% P from a standard purified grade calcium phosphate (SP), or with 0.15% P from experimental FP or RP. Each diet was fed to six pen replicates of four pigs per pen for 35 days (14.4 to 39.9 kg). Weight gain (WG), feed/gain (FG), plasma P (PP), bone ash (BA), and breaking strength of metacarpals and metatarsals (BS-MM) and femurs (BS-F) were improved by phosphorus addition. However, performance and bone parameters were depressed by RP, as compared to FP dietary supplementation. WG, BA, BS-MM and BS-F were regressed to P added, and slope-ratios were calculated to assess RBP in the FP and RP sources. The average bioavailability of P in the FP and RP sources, relative to SP, were 89 and 49% (WG), 112 and 49% (BA), 78 and 28% (BS-MM), and 101 and 52% (BS-F), respectively. Low animal performance and bone strength related to toxicity should be expected if rock phosphates are used to feed pigs.

Salted and fermented fish processes evaluation

Abstract: Summary Fish curing by salting and fermentation is the result of the action of certain enzymes over fresh fish. This study aimed to evaluate and compare three technological processing methods (A, B, C). Coliforms, Escherichia coli, Enterococcus spp., coagulase-positive Staphylococcus, Salmonella spp., total volatile base (TVB), pH, water activity (Wa), sodium chloride and biogenic amines were evaluated. A significant difference in histamine production (P 0.05). Wa and pH showed significant differences (P < 0.05), with values between 0.71 and 0.75, and 5.54 and 5.93. TVB values varied between 15.1 and 62.1 mg N 100 g−1, showing significant differences (P < 0.05) as well. Worrying levels of histamine were found. Processing method A was found to be the most appropriate for the production of this kind of fish.

Infecção experimental do vírus da artrite- encefalite dos caprinos em cabritos

Abstract: Caprine arthritis-encephalitis virus transmission was evaluated, and the presence and activity of the virus circulating in blood, colostrum and milk of infected animals was studied in 15 seronegative kids, using agar gel immunodiffusion and ELISA. The presence and viability of the virus circulating in blood, colostrum and milk of infected animals, as well as the possibility of infection of susceptible animals by inoculation was indirectly demonstrated. Incubation period ranged from 45 to 60 days, being ELISA test more sensitive than agar gel immunodiffusion, because it could detect early antibodies.