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首页> 外文期刊>Transactions of the Royal Society of Tropical Medicine and Hygiene >Transmission of Plasmodium falciparum in urban Yaounde, Cameroon, is seasonal and age-dependent.
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Transmission of Plasmodium falciparum in urban Yaounde, Cameroon, is seasonal and age-dependent.

机译：喀麦隆雅温得恶性疟原虫的传播是季节性的，并且取决于年龄。

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摘要

Data on malaria transmission intensity and prevalences of asexual parasites and of gametocytes were obtained in an urban district of Yaounde, Cameroon. The transmission level from mosquito to human was determined by indoor night capture of mosquitoes on human volunteers, revealing a calculated entomological inoculation rate of 34 infectious bites per person per year. Only Anopheles gambiae and A. funestus contributed to malaria transmission and their distribution was seasonal. Cross-sectional surveys every 2 months from July 1999 to May 2000 (n = 965) showed average annual prevalences of 35% Plasmodium falciparum asexual parasites (range 29-38%) and 4.4% gametocytes (range 0-6.7%). Prevalence of high parasitaemia (> 400 parasites/microL) and of gametocytes was seasonal. Prevalence of asexual parasitaemias and of gametocytaemias was age-dependent. The potential infectious reservoir in this area is dominated by the age group 0-15 years, representing 75% of carriers of asexual parasites (P < 0.001), 85% of carriers of high parasitaemias (P < 0.001), and 83% of gametocyte carriers (P = 0.03). Full year logistic models developed from the available data accurately predicted parasite prevalences in subsequent analyses, thus permitting a precise determination of study samples for intervention and seroepidemiology studies, and analysis of the infectious reservoir in this area.
机译：在喀麦隆雅温得市区获得了有关疟疾传播强度以及无性寄生虫和配子体细胞患病率的数据。从蚊子到人的传播水平是通过在志愿者身上进行室内夜间蚊子捕获来确定的，揭示了每人每年34次传染性叮咬的昆虫学计算接种率。仅冈比亚按蚊和A. funestus导致疟疾传播，其分布是季节性的。从1999年7月到2000年5月，每2个月进行一次横断面调查（n = 965），恶性疟原虫无性寄生虫的年平均流行率为35％（范围为29-38％），配子细胞的年度平均流行率为4.4％（范围为0-6.7％）。高寄生虫血症（> 400寄生虫/微升）和配子体细胞的流行是季节性的。无性寄生虫病和配子体血症的流行与年龄有关。该地区的潜在传染源主要由0-15岁年龄段构成，占无性寄生虫携带者的75％（P <0.001），高寄生虫血症携带者的85％（P <0.001）和配子细胞的83％载波（P = 0.03）。利用现有数据开发的全年逻辑模型可以在随后的分析中准确预测寄生虫患病率，从而可以准确确定用于干预和血清流行病学研究的研究样本，并对该区域的传染病库进行分析。

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