en تخصصي Special مقاله اصیل Original Article <p dir="ltr" style="text-align: justify;"><strong>Background: </strong>Ascariasis and trichuriasis are the most common intestinal geohelminthic diseases, and as such they are significant in terms of clinical and public health. This study was done to determine prevalence, status and geographic distribution patterns for Ascariasis and Trichuriasis. The study was done in the period 1991-2014 in northern Iran using Aregis 9.2 software.</p> <p dir="ltr" style="text-align: justify;"><strong>Methods: </strong>This was a review study, using description and analysis, of geographical distribution of <em>Ascaris </em>and <em>Trichuris </em>relating to townships in Mazandran province, northern Iran, covering a 23-year period. Data were collected from a review of the relevant literature, summarized and classified using Arc GIS, 9.2 to design maps and tables.</p> <p dir="ltr" style="text-align: justify;"><strong>Results: </strong>Based on results presented in tables and maps, means for prevalence of <em>Ascaris </em>and <em>Trichuris </em>were divided into five groups. The maximum prevalence rate of <em>Ascaris </em>was 16.3% reported in rural areas of Tonkabon in 1981-1982. Prevalence means for <em>Ascaris </em>in the central and western areas of Mazandaran province were 2%-4% and 4%, respectively. The maximum prevalence of <em>Trichuris </em>in the rural area of Tonkabon was 22.5% and the lowest 0.06% was among the cattle breeder&rsquo;s in rural areas of the province at in 2002-2003.</p> <p dir="ltr" style="text-align: justify;"><strong>Conclusion: </strong>Data presented in this study provides information useful to health care workers researchers and health administrators, especially for physicians, clinicians and for future research. Also, it is necessary to control and prevent geohelminthic parasitic infections, particularly in rural areas by public education for families, health authorities and health care systems.</p> Geohelminths, Ascariasis, Trichuriasis, Geographical distribution 1 6 http://ehemj.com/browse.php?a_code=A-10-93-12&slc_lang=en&sid=1 Hajar Ziaei 10031947532846002793 10031947532846002793 No Toxoplasmosis Research Center, Mazandaran University of Medical Sciences, Sari, Iran Fatemeh Sayyahi 10031947532846002794 10031947532846002794 No Research Committee, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran Mahboobeh Hoseiny 10031947532846002795 10031947532846002795 No GIS Research Center, Mazandaran University of Medical Sciences, Sari, Iran Mohammad Vahedi 10031947532846002796 10031947532846002796 No Faculty Member, Department of Microbiology, Mazandaran University of Medical Sciences, Sari, Iran Shirzad Gholami sgholami200@gmail.com 10031947532846002797 10031947532846002797 Yes Molecular and Cell Biology Research Center, Department of Parasitology and Mycology, Mazandaran University of Medical Sciences, Sari, Iran