Consulta: subjectFacets:"Toxigenicity"
Registros recuperados: 3
Data/hora: 05/06/2024 18:10:23

TOXIGENICITY CHARACTERIZATION OF Clostridium perfringens FROM BOVINE ISOLATES
Provedor de dados: 79
Autores: BALDASSI,L.; BARBOSA,M. L.; BACH,E. E.; IARIA,S. T.
Clinical samples from 71 bovine from different Brazilian states were processed for the analysis of anaerobe organisms with emphasis on the isolation and characterization of Clostridium spp. From these, eighty-nine Clostridium perfringens strains were recovered: 32 from liver, 19 from intestinal contents, 14 from kidney, 6 from rumen, 5 from nervous system, 4 from bone marrow, 2 from udder tract, blood, spleen and lung, and one from muscle. Four reference Clostridium perfringens types A, B, C, and D were used as controls in this study. All isolates were cultivated in appropriate media, and after centrifugation the supernatant and sediment were separated. From pure supernatant post exopolysaccharide (EPS) extraction, mouse toxigenicity tests were performed,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clostridium perfringens; Toxigenicity; Bovine isolates; ELISA.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302002000100010

TSST-1, enterotoxin and bacteriocin-like substance production by Staphylococcus aureus isolated from foods
Provedor de dados: 45
Autores: Carvalho,S.A.; Carmo,L.S.; Abreu,E.F.; Dias,R.S.; Apolônio,A.C.M.; Santos,S.G.; Farias,L.M.; Carvalho,M.A.R.
The production of Toxic Shock Syndrome Toxin-1 (TSST-1), enterotoxins and bacteriocin-like substances was evaluated in 95 strains of Staphylococcus aureus recovered from raw bovine milk (n=31) and from food samples involved in staphylococcal food poisoning (n=64). Enterotoxigenicity tests with the membrane over agar associated to optimal sensibility plate assays were performed and showed that 96.77% of strains recovered from milk and 95.31% from food samples produced enterotoxins A, B, C, D or TSST-1. Reference strains S. epidermidis, Bacillus cereus, Listeria monocytogenes, Lactobacillus casei, Pseudomonas aeruginosa, S. aureus, Salmonella Typhimurium, Escherichia coli, Enterococcus faecalis and Bacteroides fragilis were used as indicator bacteria in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cattle; Mastitis; Toxigenicity; Food poisoning; Bacteriocin.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352013000500035

Production of aflatoxins by Aspergillus flavus and of fumonisins by Fusarium species isolated from Brazilian sorghum
Provedor de dados: 58
Autores: Silva,Josefa B. da; Dilkin,Paulo; Fonseca,Homero; Corrêa,Benedito.
Fifty-nine Aspergillus flavus and 35 Fusarium verticillioides strains, isolated from freshly harvested (10) and stored (130) Brazilian sorghum samples, were tested regarding their ability to produce aflatoxins (coconut milk agar) and fumonisins (rice culture), respectively. Aflatoxins B1 and B2 were detected by TLC, and fumonisins B1 and B2 were analyzed by HPLC. Thirty-eight (64.4%) A. flavus strains produced detectable levels of aflatoxins at concentrations ranging from 12.00 to 3282.50 µg/kg (AFB1 + AFB2), while thirty two (91%) F. verticillioides strains produced FB1 at concentrations ranging from 0.12 to 5.38 µg/g. Two F. proliferatum strains produced low fumonisin levels. The toxigenic potential of A. flavus (64.4%) and F. verticillioides (91.5%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxigenicity; Aspergillus flavus; Fusarium verticillioides; Mycotoxins; Sorghum; Aflatoxin; Fumonisin.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000200002