Pérez P F, Constanza O, Garré M, Morelli I, Martínez A, Vecchioli G, Painceira M T
Cátedra de Microbiología I, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina.
Rev Argent Microbiol. 1993;25(1):7-14.
Water of a recreational zone of the Río de la Plata was analyzed. Levels of total heterotrophic bacteria ranged from 1.5 x 10(3) to 6.2 x 10(3) CFU/ml and total coliforms were between 5.0 x 10(2) and 7.0 x 10(3) per 100 ml. Values of fecal coliforms were between 1.0 x 10(2) and 1.3 x 10(3) per 100 ml. Among 131 E. coli strains isolated, 20.6% of cephalothin resistance was found, followed by nitrofurantoin, ampicillin, sulfisoxazole and the trimethoprim sulfamethoxazole combination. Resistance to more than one antibiotic was found in 36.7% of the strains isolated and 9.2% were resistant to three or more antibiotics. Three strains resistant to four antibiotics and one resistant to five were isolated. The highest percentage of combined resistance occurred for the pairs cephalothin-nitrofurantoin and cephalothin-ampicillin.
对拉普拉塔河休闲区的水进行了分析。总异养细菌水平在1.5×10³至6.2×10³CFU/ml之间，总大肠菌群为每100毫升5.0×10²至7.0×10³个。粪大肠菌群值为每100毫升1.0×10²至1.3×10³个。在分离出的131株大肠杆菌菌株中，发现20.6%对头孢菌素耐药，其次是呋喃妥因、氨苄青霉素、磺胺异恶唑和甲氧苄啶磺胺甲恶唑组合。在分离出的菌株中，36.7%对一种以上抗生素耐药，9.2%对三种或更多抗生素耐药。分离出三株对四种抗生素耐药的菌株和一株对五种抗生素耐药的菌株。联合耐药百分比最高的是头孢菌素 - 呋喃妥因和头孢菌素 - 氨苄青霉素组合。
