Serotypes among Lancefield-group G streptococci isolated in Nigeria.

Six serotypes were found among haemolytic streptococci of Lancefield-group G. Members of these types accounted for about one-third of the strains isolated from human infections and carriers in Nigeria. The type antigens were similar to the M-protein antigens of group-A streptococci in that they were associated with the ability of the streptococci to survive and multiply in fresh human blood unless specific antibody was present.

A 12-month surveillance of 'flu-like infections in a sample from the population of Lagos.

5,576 people who had two or more of the following symptoms, running nose, cough, fever and crepitations/rhonchi over the chest were interviewed. 1,355 specimens of nasal and throat swabs from those interviewed were processed for viruses associated with upper respiratory tract infection. There was a sharp rise in 'flu-like symptoms in March 1976, followed by a much higher incidence from June, reaching a peak in August.