{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,31]],"date-time":"2025-07-31T00:27:53Z","timestamp":1753921673679},"reference-count":30,"publisher":"Cambridge University Press (CUP)","issue":"2","license":[{"start":{"date-parts":[[2009,10,19]],"date-time":"2009-10-19T00:00:00Z","timestamp":1255910400000},"content-version":"unspecified","delay-in-days":6045,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":["journals.cambridge.org"],"crossmark-restriction":true},"short-container-title":["Epidemiol. Infect."],"published-print":{"date-parts":[[1993,4]]},"abstract":"<jats:title>SUMMARY<\/jats:title><jats:p>Sampling of sera from 202 Sudanese and 124 Swedish children 1\u201314 years of age was conducted at the end of the 1980s presenting an opportunity to compare the seroprevalence of anti-<jats:italic>Neisseria meningitidis<\/jats:italic> (MC) serogroup A antibodies in an area immediately before outbreak of an epidemic (Sudan 1988) with a low endemic area (Sweden). An ELISA antibody assay was developed for detection of antibodies against capsular polysaccharide of MC serogroup A and <jats:italic>Haemophilus influenzae<\/jats:italic> type b (Hib). Serum antibody against MC serogroup A was found significantly more frequently in Sudanese than in Swedish children. This indicates that factors other than herd immunity, as measured by serum antibodies against MC serogroup A polysaccharide, are important for avoidance of an MC serogroup A epidemic. The seroprevalence of Hib antibodies was, in contrast, significantly higher in Swedish than in Sudanese children, especially for 5\u20139-year-old children. A possible explanation may be the different systems of day-care of children in the two countries.<\/jats:p>","DOI":"10.1017\/s0950268800068242","type":"journal-article","created":{"date-parts":[[2009,10,19]],"date-time":"2009-10-19T08:39:50Z","timestamp":1255941590000},"page":"307-316","update-policy":"http:\/\/dx.doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":6,"title":["Different seroprevalences of antibodies against <i>Neisseria meningitidis<\/i> serogroup A and <i>Haemophilus influenzae<\/i> type b in Sudanese and Swedish children"],"prefix":"10.1017","volume":"110","author":[{"given":"M. A. M.","family":"Salih","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H.","family":"Fredlund","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Hugosson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.","family":"Bodin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"Olc\u00e9n","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2009,10,19]]},"reference":[{"key":"S0950268800068242_ref025","first-page":"101","volume":"22","author":"Salih","year":"1990","journal-title":"Features of a large epidemic of group A meningococcal meningitis in Khartoum, Sudan in 1988"},{"key":"S0950268800068242_ref028","first-page":"1","volume":"60","author":"Galazka","year":"1982","journal-title":"Meningococcal disease and its control with meningococcal polysaccharide vaccine"},{"key":"S0950268800068242_ref004","first-page":"1012","volume":"319","author":"Smith","year":"1988","journal-title":"Neurologic sequelae of meningitis"},{"key":"S0950268800068242_ref023","unstructured":"23. Hall BH , Cummins C , Schnake R. Time Series Processor, Version 4.2. 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