Factors affecting carriage of Neisseria meningitidis among Greek military recruits

Abstract

SUMMARYGreek military recruits (993) were examined for carriage of meningococci during July 1990. Blood, saliva and throat swab specimens were obtained and each recruit answered a questionnaire providing information on age, education (a measure of socioeconomic level), place of residence, smoking habits and recent infections.The overall carriage rate was 25% but differed between the two camps: 79/432 (18%) in Camp A and 168/561 (30%) in Camp B (P < 0·0005). In Camp B, there were significantly higher proportions of recruits who were non-secretors (P < 0·0005), and/or heavy smokers (P < 0·0005). They were also younger ( < 19 years old) (P < 0·001), and on the whole had fewer years of education (P < 0·0005). By univariate analysis, carriage was significantly associated with smoking. By multiple logistic regression analysis, carriage was associated with smoking (P < 0·001), age (P < 0·01) and the camp in which the recruits were based (P < 0·01). Among recruits in Camp B, 15/38 (40%) of those with recent viral infections were carriers compared with 30% for the camp in general.