RESUMO
Sewage water of Casablanca, an industrial city in Morocco, was studied for microorganisms resistant to heavy metals. Isolates were purified and collected on agar slants to be screened for resistance to heavy metals, including mercury in vitro. The strains that showed high resistance to heavy metals were also studied for their resistance to antibiotics and aromatic hydrocarbons. Results indicated that the strains most resistant to all tested products belonged to Ps. fluorescens, Ps. aeruginosa, Klebsiella pneumoniae, Proteus mirabilis, and Staphylococcus sp. These strains exhibit high minimal inhibitory concentrations for heavy metals such as cadmium (2 mm) or mercury (1.2 mm). Growth of Ps. fluorescens and Klebsiella pneumoniae in the presence of heavy metals was also determined, and the growth curves indicated that mercury, copper, and zinc present a slight inhibitory action, while cadmium and silver could have a potent inhibitory action on growth compared with the controls. These studies also investigated growth in media containing aromatic compounds as the sole source of carbon. The results demonstrate that these strains could be good candidates for remediation of some heavy metals and aromatic compounds in heavily polluted sites.
Assuntos
Antibacterianos/farmacologia , Bactérias/efeitos dos fármacos , Microbiologia Ambiental , Metais Pesados/farmacologia , Esgotos/microbiologia , Bactérias/crescimento & desenvolvimento , Cádmio/farmacologia , Cobre/farmacologia , Resistência Microbiana a Medicamentos , Hidrocarbonetos Aromáticos/farmacologia , Klebsiella pneumoniae/efeitos dos fármacos , Klebsiella pneumoniae/crescimento & desenvolvimento , Mercúrio/farmacologia , Testes de Sensibilidade Microbiana , Marrocos , Proteus mirabilis/efeitos dos fármacos , Proteus mirabilis/crescimento & desenvolvimento , Pseudomonas/efeitos dos fármacos , Pseudomonas/crescimento & desenvolvimento , Prata/farmacologia , Staphylococcus/efeitos dos fármacos , Staphylococcus/crescimento & desenvolvimento , Fatores de Tempo , Zinco/farmacologiaRESUMO
Between 1980 and 1987, 12 systematic surveys were made on a population of 254,979 people, of whom 236,868 were actually examined (92.61%). 422 suspected cases were identified i.e. a global detection rate of 1.66% of which only 241 reported to Aïn-Chock Hospital for further tests (55%). Out of these 241 suspected cases, 217 proved as having leprosy, i.e. a 90% correlation between the clinical suspicion and the biological identification. The 181 suspected cases who never reported to the hospital and the 16 leprosy patients whom we lost sight of constitute as a whole 46.68% of the suspected cases first identified. This shows an obvious lack of coordination between the local Authority and the medical service. The 185 confirmed cases of leprosy are shown in the table below and compared with those of the Central Statistical Office.
