1. Department of Tropical and Infectious Diseases School of Medicine, University of Zulia, Maracaibo, Venezuela;
2. Instituto Nacional de Salud Pública (INSP), CISEI Laboratorio de Resistencia Bacteriana, Cuernavaca, Morelos, Mexico;
3. Laboratory of Bacteriology Department of Microbiology Faculty of Medicine. University of Zulia, Maracaibo, Venezuela;
4. Genetics and Molecular Biology Laboratory Faculty of Science, University of Zulia, Maracaibo, Venezuela;
5. Instituto Nacional de Salud Pública (INSP), CISEI, Departamento de Inmunología, Cuernavaca, Morelos, Mexico