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Rev. bras. parasitol. vet ; 23(4): 530-533, Oct-Dec/2014. graf
Article in English | LILACS | ID: lil-731248


Here we describe an outbreak of chorioptic mange in cattle, 56 years after its first identification in Brazil. Between the months of June and July 2011, dermatitis characterized by alopecia and crusted and thickened skin at the insertion of the tail and in the ischiorectal fossa was recognized in 40 (35.7%) out of 112 Holstein cows on a farm in the northeastern mesoregion of the state of Rio Grande do Sul, Brazil. After diagnosing mange caused by Chorioptes bovis, the cows were weighed and treated with 0.5% ivermectin, as a pour-on single dose, and were separated into two groups: cows in early lactation and those in late lactation. The survival rate of C. bovis and the healing rate in the two groups of infested cows were monitored every seven days through skin scrapings. After 28 days of evaluation, the cure rate through treatment was greater among cows in early lactation (p <0.0001). The survival rate of C. bovis was higher in cows in late lactation.

O objetivo deste estudo foi descrever um surto de sarna corióptica em bovinos, 56 anos após a sua primeira identificação no Brasil. Entre os meses de junho a julho de 2011, a dermatite caracterizada por alopecia, com crosta e espessamento da pele na inserção da cauda e na fossa isquiorretal, foi observada em 40 (35,7%) de 112 vacas holandesas de uma propriedade rural pertencente à Mesorregião do Nordeste do Estado do Rio Grande do Sul, Brasil. Após o diagnóstico da sarna causada por Chorioptes bovis, as vacas foram pesadas, tratadas com 0,5% de ivermectina pour on em dose única e separadas em dois grupos: vacas no início da lactação e no final da lactação. A taxa de sobrevivência de C. bovis e a taxa de cura dos dois grupos de vacas infestadas foram monitoradas a cada sete dias por meio de raspas de pele. Após 28 dias do estudo, a taxa de cura com o tratamento foi maior em vacas no início da lactação (p <0,0001). A taxa de sobrevivência de C. bovis foi maior em vacas no final da lactação.

Animals , Female , Male , Mice , Air Pollutants/toxicity , Bone Marrow Cells/drug effects , Micronuclei, Chromosome-Defective/drug effects , Sulfur Dioxide/toxicity , Antibiotics, Antineoplastic/pharmacology , Antineoplastic Agents, Alkylating/pharmacology , Cyclophosphamide/pharmacology , Dose-Response Relationship, Drug , Dimethyl Sulfoxide/pharmacology , Erythrocytes/drug effects , Mitomycin/pharmacology , Sulfites/toxicity
Braz. j. microbiol ; 44(3): 935-944, July-Sept. 2013. ilus, graf, tab
Article in English | LILACS | ID: lil-699788


Sixty six indigenous Saccharomyces cerevisiae strains were evaluated in stressful conditions (temperature, osmolarity, sulphite and ethanol tolerance) and also ability to flocculate. Eighteen strains showed tolerant characteristics to these stressful conditions, growing at 42 ºC, in 0.04% sulphite, 1 mol L-1 NaCl and 12% ethanol. No flocculent characteristics were observed. These strains were evaluated according to their fermentative performance in sugar cane juice. The conversion factors of substrates into ethanol (Yp/s), glycerol (Yg/s) and acetic acid (Yac/s), were calculated. The highest values of Yp/s in sugar cane juice fermentation were obtained by four strains, one isolated from fruit (0.46) and the others from sugar cane (0.45, 0.44 and 0.43). These values were higher than the value obtained using traditional yeast (0.38) currently employed in the Brazilian bioethanol industry. The parameters Yg/s and Yac/s were low for all strains. The UFLA FW221 presented the higher values for parameter related to bioethanol production. Thus, it was tested in co-culture with Lactobacillus fermentum. Besides this, a 20-L vessel for five consecutive batches of fermentation was performed. This strain was genetically stable and remained viable during all batches, producing high amounts of ethanol. The UFLA FW221 isolated from fruit was suitable to produce bioethanol in sugar cane juice. Therefore, the study of the biodiversity of yeasts from different environmental can reveal strains with desired characteristics to industrial applications.

Stress, Physiological , Saccharomyces cerevisiae/physiology , Acetic Acid/metabolism , Brazil , Carbohydrate Metabolism , Cell Aggregation , Ethanol/metabolism , Ethanol/toxicity , Fermentation , Glycerol/metabolism , Saccharomyces cerevisiae/drug effects , Saccharomyces cerevisiae/growth & development , Saccharomyces cerevisiae/radiation effects , Sodium Chloride/metabolism , Sodium Chloride/toxicity , Sulfites/metabolism , Sulfites/toxicity , Temperature
J Environ Biol ; 2003 Oct; 24(4): 449-52
Article in English | IMSEAR | ID: sea-113782


In the present study, the impact of sodium metabisulphite (Na2S2O5), a food preservative, on seed germination, growth and yield of Vigna sinensis, Savi has been evaluated. Observations clearly reveal the deleterious effect of Na2S2O5 on germination, stomatal development, stomatal index, chlorophyll content and yield. The shoot length exhibited a steady rise in length, while the biomass showed a gradual decrease with the increasing doses of Na2S2O5.

Biomass , Chlorophyll/metabolism , Dose-Response Relationship, Drug , Fabaceae/drug effects , Food Preservatives/toxicity , Plant Shoots/drug effects , Reproduction/drug effects , Sulfites/toxicity
Bol. Centro Pesqui. Process. Aliment ; 9(1): 24-9, jan.-jun. 1991. tab
Article in Portuguese | LILACS | ID: lil-108834


Apresenta os resultados da análise de 14 marcas de bebidas refrigerantes produzidas e/ou comercializadas na cidade de Manaus, AM. Demonstra a presença de sulfitos em 6 marcas, o que corresponde a 42% do total. Verifica que 85,7% das bebidas refrigerantes totalmente produzidas na regiao, apresentavam sulfitos, indevidamente, em sua composiçao. Discute os riscos que a presença destas substâncias nas bebidas podem oferecer à populaçao consumidora

Carbonated Beverages , Sulfites/toxicity