During an epidemic of meningococcal meningitis 86 patients with symptoms and signs of meningitis were treated with a single intramuscular injection of a long-acting oily preparation of chloramphenicol (Tifomycine). Treatment was given by auxiliary medical staff who worked in four separate village dispensaries under the supervision of the local medical officer. The clinical response to treatment was satisfactory; 79 of 86 patients (92%) recovered fully with few residual disabilities. There were five deaths (5.8%) but a definite diagnosis of meningococcal meningitis was established in only one of these patients. Treatment was changed because of a poor clinical response in two further patients. Diagnosis was eventually proved in 45 patients (52%). The response to treatment of patients in this group was similar to that observed in the remaining 41 patients. The results of this preliminary study show that a single dose injection of a long-acting chloramphenicol is of value in the management of epidemics of meningococcal meningitis in rural areas because patients can be treated locally and early in their village dispensaries, thereby minimizing the need to transport them to urban hospitals which are often distant and congested.