Department of Public Health, Faculty of Health, Qom University of Medical Sciences, Ruhollah Sq., 14739-79966, Qom, Iran.
Int J Infect Dis. 2013 Dec;17(12):e1198-206. doi: 10.1016/j.ijid.2013.07.003. Epub 2013 Sep 6.
OBJECTIVES: This study was performed to evaluate the epidemiological status of cutaneous leishmaniasis (CL) in the most important endemic foci of Qom Province, central Iran. The city of Qom is the largest center for Shi'a scholarship in the world and is a significant pilgrimage destination. METHODS: During 2006-2011, all suspected CL patients with skin lesion(s) referred to regional health centers of Ghomrood and Ghanavat regions, and all actively detected cases, were examined clinically and parasitologically for CL. Patient information was recorded and patients were categorized based on the number and size of the lesions. Odds ratios (OR) of different risk factors were calculated. RESULTS: A total of 849 (59.2% male, 40.8% female) confirmed cases of CL were enrolled; the average incidence rate of the disease was 14.9 per 100000 people. During the study period 2006-2011, the trend in CL incidence showed no sudden variations in the areas studied, except for an outbreak of CL in 2009. Leishmania major was identified as the causative agent based on internal transcribed spacer 1 (ITS1) ribosomal DNA PCR analysis. During the study period, the age distribution of CL cases was relatively stable, with the majority (50%) of patients aged 1-25 years. Most cases (n=468; 55.1%) had a single lesion and 82 (9.6%) patients had four or more lesions (range 1-29). The risk of developing multiple lesions was significantly increased in patients with seasonal jobs (summer workers) (p=0.023; OR 1.516) and significantly decreased in patients who were affected in winter (p=0.010; OR 0.398). The risk of developing large-sized lesions (>1cm) was significantly increased in patients in the age groups>25 years (p=0.001-0.015; OR 2.5-3.5) and decreased in patients with seasonal jobs (summer workers) (p=0.005; OR 0.570). CONCLUSIONS: The present data show the importance of CL as a health problem in suburban areas of Qom Province. In order to identify other epidemiological aspects of leishmaniasis in this area, studies on vectors and reservoirs are recommended. Since leishmaniasis caused by L. major is typically zoonotic, control measures should focus on rodents as the main reservoirs and Phlebotomus papatasi as the main vector. Awareness should be raised in the high-risk populations comprising people with diabetes, young adults (<25 years old), and those who work outdoors during the summer.
目的:本研究旨在评估伊朗中部戈姆罗德和甘纳瓦特地区(Qom 省最重要的地方性利什曼病(CL)流行区的流行病学状况。Qom 市是世界上最大的什叶派学术中心,也是一个重要的朝圣地。
方法:2006-2011 年期间,对所有有皮肤损伤的疑似 CL 患者(戈姆罗德和甘纳瓦特地区的区域卫生中心转诊的患者和主动发现的所有患者)进行临床和寄生虫学检查以确诊 CL。记录患者信息,并根据病变的数量和大小对患者进行分类。计算不同危险因素的比值比(OR)。
结果:共纳入 849 例(59.2%为男性,40.8%为女性)确诊 CL 患者;该疾病的平均发病率为 14.9/100000 人。在 2006-2011 年的研究期间,除 2009 年发生 CL 爆发外,研究地区的 CL 发病率趋势无明显变化。根据内部转录间隔 1(ITS1)核糖体 DNA PCR 分析,确定引起疾病的病原体为利什曼原虫。在研究期间,CL 病例的年龄分布相对稳定,大多数(50%)患者年龄在 1-25 岁之间。大多数患者(n=468;55.1%)有一个病变,82 例(9.6%)患者有四个或更多病变(范围 1-29)。季节性工作(夏季工人)的患者发生多个病变的风险显著增加(p=0.023;OR 1.516),冬季发病的患者风险显著降低(p=0.010;OR 0.398)。年龄大于 25 岁的患者(p=0.001-0.015;OR 2.5-3.5)发生大病变(>1cm)的风险显著增加,而季节性工作(夏季工人)的患者风险显著降低(p=0.005;OR 0.570)。
结论:目前的数据表明,CL 是 Qom 省郊区地区的一个重要健康问题。为了确定该地区利什曼病的其他流行病学特征,建议研究媒介和宿主。由于由 L. major 引起的利什曼病通常是动物源性的,因此控制措施应侧重于作为主要宿主的啮齿动物和作为主要媒介的 Phlebotomus papatasi。应提高高危人群的认识,包括糖尿病患者、年轻人(<25 岁)和夏季户外工作者。
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