| ross river virus (togaviridae: alphavirus) infection (epidemic polyarthritis) in american samoa. | an outbreak of ross river virus infection (epidemic polyarthritis), which occurred in american samoa between august 1979 and january 1980, is described. on the basis of a serological survey performed near the end of the epidemic, it is estimated that at least 13,500 people were infected. ross river virus was isolated from the blood of a single polyarthritis patient. plaque reduction neutralization tests, using this virus strain, were done on 393 human and 143 animal sera collected on tutuila isl ... | 1981 | 7324110 |