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Articles by Antonio Carlos Alessi
Total Records ( 2 ) for Antonio Carlos Alessi
  Elizabeth Santin , Antonio Carlos Paulillo , Alex Maiorka , Laura Satiko Okada Nakaghi , Marcos Macari1 , Ana Vitoria Fischer da Silva and Antonio Carlos Alessi
  A study was carried out to evaluate the efficacy of Saccharomyces cerevisiae (SC) as an inhibitor of aflatoxicosis in broilers. Clinic, pathologic, immune and productive aspects of broilers fed with aflatoxin in the diets were studied. The results showed that the feed intake and weight gain were negatively affected (P < 0.01) for aflatoxin in diet (1000 ppb). The SC (0, 20%) added to diet did not ameliorated the negatively aflatoxin effect at broiler weight gain, however the SC improve the feed conversion in this birds. The humoral immune response of broilers vaccinated against Newcastle virus disease (NDV) was reduced for aflatoxin in diet, as also the liver, kidneys and bursa of Fabricius were negatively affected for this toxin at diet. The SC did not improve the hemagglutination inhibiting antibody titers in birds fed with aflatoxin in diet, however improve the immune response of broilers at challenge with strain velogenic of NDV.
  Marcia Nishizawa , Antonio Carlos Paulillo , Antonio Carlos Alessi , Aryana Duker Nunes , Josie Maria Campioni , Laura Satiko Okada Nakaghi , Luciano Doretto Junior and Fabiana Silva Lima
  This study aimed the characterization of the importance of vaccination against Newcastle disease in white Pekin duck (Anas platyrhynchos), and investigated the state of carrier of the virus in this species. There were used 120 Pekin ducks, distributed at random into 4 groups, vaccinated or not. At 60 days of age, all groups were challenged with a pathogenic virus (NDV) suspension, EID50 = 108,15/0,1mL. Cloacal and tracheal swabs were collected after 6, 14, 20 and 30 days post-challenge for viral isolation in SPF embryonated eggs. White Pekin duck of all the groups did not demonstrate symptoms of the Newcastle disease. They were refractory to the clinical disease with the NDV. In Pekin ducks from control group, the viral isolation was obtained from 20 up to 30 days after challenge. It was demonstrated therefore the state of carrier of NDV of the Pekin duck. In ducks from vaccinated groups, the viral isolation was null. It was also demonstrated therefore the importance of the vaccination in the suppression of the state of carrier of the NDV in white Pekin ducks.
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