Tsai T F, Lazuick J S, Ngah R W, Mafiamba P C, Quincke G, Monath T P
Bull World Health Organ. 1987;65(6):855-60.
A cluster of fatal hepatitis cases in northern Cameroon in 1984 stimulated a field investigation to rule out an epidemic of yellow fever. A serosurvey of villages in the extreme north of the country, in a Sudan savanna (SS) phytogeographical zone, disclosed no evidence of recent yellow fever infection. However, further south, in a Guinea savanna (GS) phytogeographical zone, serological evidence was found of endemic yellow fever virus transmission. The results indicate a potential for epidemic spread of yellow fever virus from the southern GS zone to the nothern SS zone of Cameroon, where immunity in the population was low.
1984年，喀麦隆北部出现了一批致命肝炎病例，促使开展了一项实地调查，以排除黄热病流行的可能性。在该国最北部处于苏丹稀树草原（SS）植物地理区的村庄进行的血清学调查，未发现近期感染黄热病的证据。然而，在更南部处于几内亚稀树草原（GS）植物地理区的地方，发现了黄热病病毒地方性传播的血清学证据。结果表明，黄热病病毒有从喀麦隆南部的GS区传播到北部SS区的可能性，而北部地区人群的免疫力较低。
