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1.
Rev Argent Microbiol ; 32(1): 15-9, 2000.
Article in Spanish | MEDLINE | ID: mdl-10785938

ABSTRACT

We have compared three methods for the detection and quantification of coliforms and E. coli in fish: the conventional three-tube MNP method (APHA), the Simplate Method and the Petrifilm Method. Thirty samples of the tilapia's external surface (skin, gills and fin) produced in an artificial pond were collected. Samples were processed individually in buffered peptone water 1%, then they were diluted and inoculated in Simplate, Petrifilm and LST tubes. Coliforms were isolated from 100% of the samples. The Simplate and 3M Petrifilm results were obtained after 24 h of incubation. The conventional three-tube MNP method showed results only after 96 hours of incubation. Simplate showed better recovery of coliforms and E. coli than 3 M Petrifilm and APHA method (P < 0.05). 3M Petrifilm and APHA were not significantly different for E. coli recovery.


Subject(s)
Colony Count, Microbial/veterinary , Enterobacteriaceae Infections/veterinary , Enterobacteriaceae/isolation & purification , Escherichia coli/isolation & purification , Fish Diseases/microbiology , Tilapia/microbiology , Animals , Aquaculture , Colony Count, Microbial/methods , Enterobacteriaceae Infections/microbiology , Extremities/microbiology , Fresh Water , Gills/microbiology , Skin/microbiology
2.
Rev. argent. microbiol ; 32(1): 15-19, ene.-mar. 2000.
Article in Spanish | LILACS | ID: lil-332543

ABSTRACT

We have compared three methods for the detection and quantification of coliforms and E. coli in fish: the conventional three-tube MNP method (APHA), the Simplate Method and the Petrifilm Method. Thirty samples of the tilapia's external surface (skin, gills and fin) produced in an artificial pond were collected. Samples were processed individually in buffered peptone water 1, then they were diluted and inoculated in Simplate, Petrifilm and LST tubes. Coliforms were isolated from 100 of the samples. The Simplate and 3M Petrifilm results were obtained after 24 h of incubation. The conventional three-tube MNP method showed results only after 96 hours of incubation. Simplate showed better recovery of coliforms and E. coli than 3 M Petrifilm and APHA method (P < 0.05). 3M Petrifilm and APHA were not significantly different for E. coli recovery.


Subject(s)
Animals , Colony Count, Microbial/veterinary , Fish Diseases/microbiology , Enterobacteriaceae , Escherichia coli , Enterobacteriaceae Infections/veterinary , Tilapia , Aquaculture , Colony Count, Microbial/methods , Extremities , Fresh Water , Gills , Enterobacteriaceae Infections/microbiology , Skin
3.
Rev. argent. microbiol ; 32(1): 15-19, ene.-mar. 2000.
Article in Spanish | BINACIS | ID: bin-6710

ABSTRACT

We have compared three methods for the detection and quantification of coliforms and E. coli in fish: the conventional three-tube MNP method (APHA), the Simplate Method and the Petrifilm Method. Thirty samples of the tilapias external surface (skin, gills and fin) produced in an artificial pond were collected. Samples were processed individually in buffered peptone water 1, then they were diluted and inoculated in Simplate, Petrifilm and LST tubes. Coliforms were isolated from 100 of the samples. The Simplate and 3M Petrifilm results were obtained after 24 h of incubation. The conventional three-tube MNP method showed results only after 96 hours of incubation. Simplate showed better recovery of coliforms and E. coli than 3 M Petrifilm and APHA method (P < 0.05). 3M Petrifilm and APHA were not significantly different for E. coli recovery.(AU)


Subject(s)
Comparative Study , Animals , Colony Count, Microbial/veterinary , Enterobacteriaceae/isolation & purification , Enterobacteriaceae Infections/veterinary , Escherichia coli/isolation & purification , Fish Diseases/microbiology , Tilapia/microbiology , Aquaculture , Colony Count, Microbial/methods , Enterobacteriaceae Infections/microbiology , Extremities/microbiology , Fresh Water , Gills/microbiology , Skin/microbiology
4.
Rev. argent. microbiol ; 32(1): 15-9, 2000 Jan-Mar.
Article in Spanish | BINACIS | ID: bin-39908

ABSTRACT

We have compared three methods for the detection and quantification of coliforms and E. coli in fish: the conventional three-tube MNP method (APHA), the Simplate Method and the Petrifilm Method. Thirty samples of the tilapias external surface (skin, gills and fin) produced in an artificial pond were collected. Samples were processed individually in buffered peptone water 1


, then they were diluted and inoculated in Simplate, Petrifilm and LST tubes. Coliforms were isolated from 100


of the samples. The Simplate and 3M Petrifilm results were obtained after 24 h of incubation. The conventional three-tube MNP method showed results only after 96 hours of incubation. Simplate showed better recovery of coliforms and E. coli than 3 M Petrifilm and APHA method (P < 0.05). 3M Petrifilm and APHA were not significantly different for E. coli recovery.

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