Introduccion: la meningitis bacteriana (MB) es una enfermedad infecciosa considerada una emergencia medica. El manejo oportuno tiene importante impacto en la evolucion de la entidad. El Streptococcus agalactiae, significativo agente causal de infecciones severas en recien nacidos, puede colonizar diferentes tejidos, entre ellos el sistema nervioso central. Caso clinico : paciente masculino de 47 anos de edad, procedente de zona rural, con actividad laboral ordenador de reses bovinas, remitido a tercer nivel de atencion, con desorientacion, rigidez de nuca y convulsion tonico-clonica. Estudio de liquido cefalorraquideo indica neuroinfeccion. Manejo en UCI con esteroides, antibioticos y ventilacion mecanica. Cultivo de liquido cefalorraquideo, informa crecimiento de Streptococcus agalactiae. En coexistencia con el compromiso del sistema nervioso central se presentaba infeccion otomastoidea. Conclusion: la MB puede ser causada por el Streptococcus agalactiae, germen infrecuentemente involucrado en este tipo de patologia. Actividades laborales en la agroindustria no tecnificada, debiesen ser consideradas situaciones de riesgo. Rev. cienc.biomed. 2012;3(1):162-167 PALABRAS CLAVES Meningitis bacteriana; Streptococcus agalactiae; Mastitis bovina; Infecciones estreptococicas. SUMMARY Introduction: bacterial meningitis is an infectious disease considered a medical emergency. The timely management has an important impact on the evolution of the disease. Streptococcus agalactiae, a major causative agent of severe infections in newborns can colonize different tissues, including the central nervous system. Case report: Male patient 47 years old from rural areas, with work activity as a milker of cattle, referred to tertiary care, with disorientation, neck stiffness, and grand mal seizure. CSF study indicates neuroinfection. ICU care with steroids, antibiotics and mechanical ventilation. Cerebrospinal fluid culture reports growth of Streptococcus agalactiae. In coexistence with the central nervous system involvement appeared otomastoidea infection. Conclusion : Bacterial meningitis can be caused by Streptococcus agalactiae, germ infrequently involved in this pathology. Work activities in non-tech agribusiness, had to be considered risk. Rev.cienc.biomed. 2012;3(1):162-167 KEYWORD Bacterial meningitis; Streptococcus agalactiae; Bovine mastitis; Streptococcal infections.