Obernikhin I M, Kolpakov S L, Iakovlev A A, Briko N I
Zh Mikrobiol Epidemiol Immunobiol. 1994 Sep-Oct(5):33-6.
Morbidity in respiratory streptococcal infection in 6 ships of the State Fishery Amalgamation "Dal'ryba" during 8 voyages was analyzed. During voyages morbidity rate is determined by sporadic cases, seasonal rises at the time of the voyage and epidemic outbreaks. Spring and summer months constitute the period of risk for seasonal morbidity rises during voyages and epidemic outbreaks at the time of the formation of the crew. The minimal size of the crew in which the activation of the epidemic process took place was 350 persons. In lesser crews (250-300 persons) seasonal rises in morbidity were observed only in the presence of frequent and intensive change-over of crew members.
对国家渔业联合企业“Dal'ryba”6艘船只在8次航行期间呼吸道链球菌感染的发病率进行了分析。在航行期间，发病率由散发病例、航行期间的季节性上升以及疫情爆发决定。春季和夏季是航行期间季节性发病率上升以及船员组建时疫情爆发的风险期。发生疫情过程激活的最小船员规模为350人。在较小规模的船员群体（250 - 300人）中，只有在船员频繁且密集更换的情况下才观察到发病率的季节性上升。
