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Evaluation on the Pathogenesis of Streptococcus agalactiae in Nile Tilapia (Oreochromis niloticus) BABT
Pretto-Giordano,Lucienne Garcia; Müller,Ernst Eckehardt; Freitas,Julio Cesar de; Silva,Vanessa Gomes da.
The pathogenesis of a Streptococcus agalactiae was evaluated in a three-period experiment. Two groups of 40 fishes were intraperitoneally (i.p.) challenged in each experimental period with different infective doses of the pathogen. Doses varied from 1.0 x 10(6) to 1.5 x 10(8) CFU/fish. One group of 40 tilapia i.p. injected with tryptic soy broth (TSB) was used as a control group in each period. Mortalities varied from 67.5% in group 8 (infective dose 1.0 x 10(6) CFU/fish) to 90.0% in group 1 (infective dose 1.5 x 10(8) CFU/fish). Significant differences in mortalities were found only between group 8 and each of the other groups, except group 5 (infective dose 6.0 x 10(6) CFU/fish; mortality 75.0%). The highest mortality coefficients were observed in days...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Streptococcus agalactiae; Nile tilapia (Oreochromis niloticus); Clinical signs; Death rate.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100011
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