[Phenotype markers in strains of Aeromonas isolated in Cuba from children with an acute diarrheic disease]. / Marcadores fenotípicos en cepas de Aeromonas aisladas en Cuba de niños con enfermedad diarreica aguda.

Twenty-seven cases of Aeromonas isolated from 300 five-years children with acute diarrheal disease (EDA) were studied, with the aim for demonstrating the occurrence of some phenotypical markers associated with enteropathogenicity; among them were lysine decarboxylation, acetil methyl carbinol production, enterotoxigenicity, cytotoxicity and hemolysis. The percentage of analysed strains had two or more of the investigated markers, and 13 (48.1%) lysed the rabbit erythrocytes with titres higher than than 1:16. The presence of markers in Aeromonas hydrophila, Aeromonas sobria, and Aeromonas caviae was demonstrated.

[Sensitivity of Mycobacterium fortuitum by the broth microdilution method determining the inhibitory minimal concentration]. / Estudio de la sensibilidad de Mycobacterium fortuitum por el método de la microdilución en caldo determinando la concentración mínima inhibitoria.

A study was conducted on 40 Mycobacterium fortuitum strains isolated from symptomatic patients suffering from respiratory diseases and skin lesions. Their susceptibility to different antimicrobial agents was determined by the broth microdilution method, measuring minimal inhibitory concentration. There was sensitivity of the strains to gentamicin and tetracycline as well as resistance to the tuberculostatic drugs used (isoniazid and ethambutol) and cefalotin.

[Yersinia enterocolitica: investigation in 1,300 children under 5 years of age with acute diarrhea]. / Yersinia enterocolitica: investigación en 1.300 niños menores de 5 años con enfermedad diarreica aguda.

The presence of Yersinis enterocolitica was investigated in feces of 1,300 children younger than 5 years, hospitalized because of presenting acute diarrheic disease in Cuba during 1985-1988 period at different provincial pediatric hospital, as well as in Havana City. Selective agar base for Yersinia was used supplemented with cephsuloidin, Irgasan and novoviocin (CIN) and buffered saline solution as enrichment medium. This last one at 4 degrees C during 21 days with weekly resowings to the selective medium. Isolation of Yersinia enterocolitica was not obtained in any of the patients under study.