Study on the population carriage of Streptococcus pneumoniae,Haemophilus influenzae and Moraxella catarrhalis in children at the age of 12～18 months in Dongguan city

Objective:The study was intended to research the epidemiology of the infection of Streptococcus pneumoniae,Haemophilus influenzae and Moraxella catarrhalis,and to provide essential information for looking for the methods of preventing and controlling the three pathogens.Methods:600 cases of normal children at the age of 12~18 months from the five surveillance points in Dongguan city were investigated.The nasopharyngeal specimens were cultured and separated on the Blood media and Chocolate media.The pure strains were indentified by biochemical reactions.Results:The detection rate of Streptococcus pneumoniae,Haemophilus influenzae and Moraxella catarrhalis were 19.2%(115/600),4.2%(25/600) and 17.3%(104/600),respectively.Conclusion:The detection rate of Moraxella catarrhalis is 7.0%(21/300) in the summer,and 27.7%(83/300) in the winter.It is different remarkably in different seasons.The difference of the three pathogens in the different place is not observably.