title: Febrile episode among a floating population of C.R.P.F. Jawans stationed at Calcutta.
abstract: A virological investigation was carried out to establish the etiologic agent of a febrile outbreak amongst a floating population of C.R.P.F. Jawans, stationed at Calcutta during May-July, 1993. The illness was associated with fever, severe headache, bodyache and arthralgia which lasted for 2-4 days in most of the cases. Fifty cases were examined clinically and blood samples (both acute and convalescent) were subjected to virological study. One mouse-pathogenic agent could be isolated in suckling mice and identified as DEN-3. Sero-investigation of 50 single sera by HI & CF method revealed evidence of presumptive dengue infection in 33, while sero-conversion could be noted in 10 out of 25 available paired sera tested. Results of MAC ELISA revealed evidence of primary dengue infection in 6 out of 12 acute phase sera examined. Thus, the study shows that the episode is strongly suggestive of primary dengue infection.
mesh_terms: D000328:Adult; D000818:Animals; D003168:Complement Fixation Tests; D003715:Dengue / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology; D003716:Dengue Virus / Q000302:isolation & purification*; D004196:Disease Outbreaks; D006801:Humans; D007194:India / Q000453:epidemiology; D008297:Male; D051379:Mice; D008875:Middle Aged; D016495:Police