In July (winter) of 2005 and January (summer) of 2006 there was realized the microbiological study of the water of 8 beaches of summery recreation of the coast of Lima by the purpose of evaluating the usefulness of Escherichia coli and Enterococcus like indicators of fecal pollution. In every month 5 series of samplings were done. They used like indicators of fecal pollution total Coliforms (CT) 5,000 NMP/100mL, fecal Coliforms (CF) 1,000 NMP/100mL according to the Peruvian Norm and also to Escherichia coli (EC) 100 NMP/100mL and Enterococcus (E) 35 NMP/100mL. The results of the analyses realized in January qualify to the water of 3 beaches like unacceptable for the bath, according to the Peruvian Norm; but it is used as indicator EC and E, 8 beaches would be considered to be like unacceptable. The results of July demonstrate that the water of 8 beaches was acceptable, according to the P...

To detect injured coliforms (IC) in drinking water considered suitable for the human consumption according to the Peruvian normativity, were taken and processed 100 water samples of buildings of the district of Lima Cercado. For the analysis the residual free chlorine (RFC) by means of DPD technique and pH was determined using indicating rods Merck. For the count of heterotrophic bacteria (HB) the spread plate method was used, to quantify total Coliform (TC) and fecal Coliform (FC) the techniques of multiple tubes and membrane fi lter were used. In order to recover and to enumerate injured TC and FC the m-T7 medium were used. For the bacterial specifi cation the standard tests and API 20E system. For CI’s detection there were in used the samples that turned out to be negative for TC and FC and/or had count of HB an equal or lower to 500 UFC/mL. Using the conventional methods was demons...

To detect injured coliforms (IC) in drinking water considered suitable for the human consumption according to the Peruvian normativity, were taken and processed 100 water samples of buildings of the district of Lima Cercado. For the analysis the residual free chlorine (RFC) by means of DPD technique and pH was determined using indicating rods Merck. For the count of heterotrophic bacteria (HB) the spread plate method was used, to quantify total Coliform (TC) and fecal Coliform (FC) the techniques of multiple tubes and membrane fi lter were used. In order to recover and to enumerate injured TC and FC the m-T7 medium were used. For the bacterial specifi cation the standard tests and API 20E system. For CI’s detection there were in used the samples that turned out to be negative for TC and FC and/or had count of HB an equal or lower to 500 UFC/mL. Using the conventional methods was demons...

In July (winter) of 2005 and January (summer) of 2006 there was realized the microbiological study of the water of 8 beaches of summery recreation of the coast of Lima by the purpose of evaluating the usefulness of Escherichia coli and Enterococcus like indicators of fecal pollution. In every month 5 series of samplings were done. They used like indicators of fecal pollution total Coliforms (CT) 5,000 NMP/100mL, fecal Coliforms (CF) 1,000 NMP/100mL according to the Peruvian Norm and also to Escherichia coli (EC) 100 NMP/100mL and Enterococcus (E) 35 NMP/100mL. The results of the analyses realized in January qualify to the water of 3 beaches like unacceptable for the bath, according to the Peruvian Norm; but it is used as indicator EC and E, 8 beaches would be considered to be like unacceptable. The results of July demonstrate that the water of 8 beaches was acceptable, according to the P...

This study evaluates the genotoxic injury in the species Colossoma macropomum (“Gamitana") when exposed to the pesticide Fipronil, for which we used the micronucleus test (MN). We workwed with juveniles in the third stage, placed in glass tanks, which were exposed to 3 different concentrations of fipronil (C1: 0.075 mg /L, C2: 0.15 mg /L and C3: 0.30 mg /L), evaluated at 24 and 48 h. Peripheral blood was used which made the spread. The counting of micronuclei and abnormalities was made on the basis of 1000 cells. The average rate of micronuclei indicates that 0.075 mg / L the average frequency is twice the control. With regard to abnormalities of the core, was found more frequently at 48 h of exposure.

This study evaluates the genotoxic injury in the species Colossoma macropomum (“Gamitana") when exposed to the pesticide Fipronil, for which we used the micronucleus test (MN). We workwed with juveniles in the third stage, placed in glass tanks, which were exposed to 3 different concentrations of fipronil (C1: 0.075 mg /L, C2: 0.15 mg /L and C3: 0.30 mg /L), evaluated at 24 and 48 h. Peripheral blood was used which made the spread. The counting of micronuclei and abnormalities was made on the basis of 1000 cells. The average rate of micronuclei indicates that 0.075 mg / L the average frequency is twice the control. With regard to abnormalities of the core, was found more frequently at 48 h of exposure.