Dossou-Yovo J, Ouattara A, Doannio J M, Diarrassouba S, Chauvancy G
Unité de Recherche l'Institut Pierre Richet@OCCGE, Bouaké, Côte d'Ivoire.
Med Trop (Mars). 1998;58(1):51-6.
The purpose of this report is to describe six surveys carried out from March 1993 to March 1994 to assess seasonal variations in parasite indexes and malaria morbidity rates in children between the ages of 0 and 14 years living in the village of Alloukoukro in the wet Savannah region of Cote d'Ivoire. Results demonstrated the presence of both Plasmodium falciparum and Plasmodium malariae. No case of infection only by Plasmodium malriae was observed. Parasite indexes were greater than 50% in all newborns and preschoolers. Wide seasonal variations were observed with the highest indexes (91.9%) occurring at the end of the rainy season. The lowest indexes were always observed in children between the ages of 10 and 14 years. There was not a significant proportional relationship between parasite index and daily mosquitoes inoculation rates. However highest parasite indexes were always measured after periods of intense transmission. Overall findings showed that gametocyte index increased during the rainy season and peaked at the beginning of the dry season in December. Strong recrudescence of malarious disease during the rainy season corresponded to an increase in the mean parasite density. The seasonal rises in malaria incidence occurred a few weeks after the first rains of the year with the greatest incidence occurring in May. Curves for maximum mean parasitemia rate and peak parasite incidence crossed at the end of the rainy season in October. The results of this study indicate that malaria is the most common parasitic disease year round in children living in the wet Savannah region of Cote d'Ivoire and that it is one of the main causes of morbidity.
本报告旨在描述1993年3月至1994年3月期间开展的六项调查，以评估居住在科特迪瓦湿草原地区阿卢库克罗村的0至14岁儿童的寄生虫指数和疟疾发病率的季节性变化。结果显示存在恶性疟原虫和间日疟原虫。未观察到仅感染间日疟原虫的病例。所有新生儿和学龄前儿童的寄生虫指数均高于50%。观察到明显的季节性变化，最高指数（91.9%）出现在雨季末期。最低指数总是在10至14岁的儿童中观察到。寄生虫指数与每日蚊虫接种率之间没有显著的比例关系。然而，最高的寄生虫指数总是在高强度传播期之后测得。总体研究结果表明，配子体指数在雨季期间增加，并在12月旱季开始时达到峰值。雨季期间疟疾的强烈复发与平均寄生虫密度的增加相对应。疟疾发病率的季节性上升在一年的第一场雨后几周出现，最高发病率出现在5月。最大平均寄生虫血症率曲线和寄生虫发病率峰值曲线在10月雨季结束时相交。本研究结果表明，疟疾是科特迪瓦湿草原地区儿童全年最常见的寄生虫病，也是发病的主要原因之一。
