Nateghpour M, Akbarzadeh K, Farivar L, Amiri A
Department of Medical Parasitology & Mycology, Tehran University of Medical Sciences, Tehran, Iran.
Bull Soc Pathol Exot. 2011 Oct;104(4):321-3. doi: 10.1007/s13149-011-0134-8. Epub 2011 Feb 9.
Asymptomatic malaria infection is often associated with subpatent level of parasitaemia and normal clinical examination. Such infection becomes a greater cause for concern when involved in blood transfusion and vector transmission. This study was performed to monitor the situation of asymptomatic malaria among the Afghani immigrants and native residents in Iranshahr district, a malaria endemic area in southeastern Iran, by performing conventional light microscopy. Out of 446 samples collected from Afghani immigrant participants, seven (1.6%) thick blood smears were diagnosed as Plasmodium vivax. None of the individuals who tested positive had malaria symptoms and they did not remember having had any malaria signs during the past two years. Out of 496 samples collected from native resident participants, three (0.6%) thick blood smears were detected as P. vivax and Plasmodium falciparum with mild malaria symptoms. An asymptomatic Plasmodium-infected individual can be a source of malaria parasites for transmission of the agents.
无症状疟疾感染通常与亚临床水平的寄生虫血症及正常的临床检查结果相关。当这种感染涉及输血和病媒传播时，就会成为一个更令人担忧的问题。本研究通过传统光学显微镜检查，对伊朗东南部疟疾流行地区伊兰沙赫尔区的阿富汗移民和当地居民中的无症状疟疾情况进行监测。在从阿富汗移民参与者采集的446份样本中，有7份（1.6%）厚血涂片被诊断为间日疟原虫。检测呈阳性的个体均无疟疾症状，且他们不记得在过去两年中有过任何疟疾体征。在从当地居民参与者采集的496份样本中，有3份（0.6%）厚血涂片检测出间日疟原虫和恶性疟原虫，这些个体有轻微疟疾症状。无症状的疟原虫感染者可能是疟原虫传播的传染源。
