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Spatial Distribution and the Impact of Geographical Factors on Brucellosis in Chaharmahal and Bakhtiari Province, Iran

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Spatial Distribution and the Impact of Geographical Factors on Brucellosis in Chaharmahal and Bakhtiari Province, Iran International Journal of Epidemiologic Research, 2016; 3(2): 98-105. ijer.skums.ac.ir Spatial distribution and the impact of geographical factors on brucellosis in Chaharmahal and Bakhtiari Province, Iran 1 1 2* Mojgan Entezari , Shohreh Moradpour , Masoud Amiri 1Geography Dept., Physical Geography, University of Isfahan, Isfahan, I.R. Iran; 2Social Health Determinants Research Center, Shahrekrod University of Medical Sciences, Shahrekord, I.R. Iran. Received: 21/Nov/2015 Accepted: 25/Feb/2016 ABSTRACT Background and aims: Brucellosis is one of the most important common diseases among man and livestock which are considered as the major problem in the health of the Original article humans and livestock. The Importance of this disease isn’t limited to its physical problems and consequences, but it is considered as a major challenge of economic development in most countries. The aim of this study was to evaluate the effect of some regional parameters on the prevalence of this disease because of its high prevalence in Chaharmahal and Bakhtiari. Methods: This study was a descriptive- analytical and the registered statistics about those affected by Brucellosis in Chaharmahal and Bakhtiari from 2008-2011 abstracted from Center of Public Health of the province. Based on it, spatial distribution maps of Brucellosis were provided by Geographic Information System (GIS). Then, the relationship between this parameter and some regional parameters was studied by using software SPSS. Results: Extent of Brucellosis prevalence wasn’t consistent in Chaharmahal and Bakhtiari and Koohrang had the more prevalence and Lordegan, Farsan and Kiar regions had less risky. There is a meaningful relationship between increase in Brucellosis and temperature in the year 2008, 2010 and 2011 (P<0.05) (P<0.01), rainfall 2008 and 2010 (P<0.05) and moisture 2008, 2010 and 2011 (P<0.01). Conclusion: Environmental factors influence disease prevalence. Keywords: Chaharmahal and Bakhtiari province, Brucellosis, Climate, Spatial variability, GIS and SPSS software. INTRODUCTION Climate effects of the environment in emerging field in Iran which studies the medical field especially in the recent diversity of various diseases accompanied century have become so significant. by environmental possibilities and Among them, medical geography is an condition. Factors studied in medical *Corresponding author: Masoud Amiri, Social Health Determinants Research Center, Shahrekord University of Medical Sciences, Shahrekord, I.R. Iran, Tel: 00983833333710, E-mail: [email protected] 98 Entezari M, et al. Spatial distribution of Brucellosis geography related to disease include: be acute or gradually. In addition, to fever Latitude, rainy and snowfall climate, and sweat in appetence, fatigue, headache moisture, temperature, pressure, etc. One and backache, such signs as depression of the problems of underdeveloped country Lymphadenopathy and hepatosplenomegaly is severing prevalence of contagious may also be occurred.2 Its expression is diseases so that their high frequency seasonal and is increased in spring and results in increasing the mortality, summer when livestock are pregnant and population growth rate reduction and bear.3 In Iran, about 50000 Brucellosis are lowering the lifetime and life expectancy. reported each year. The highest prevalence Among contagious diseases, common is in Khorasan, Hamedan, Lorestan, West disease, common disease among human Azarbaijan, Kurdistan, Fars and East and livestock (Zoonoses) can be noticed. Azerbaijan.4 This disease can create local Brucellosis is one of these diseases. lymph infection in liver, spleen, bone and Brucellosis is an infectious common other organs.5 Its outbreak is 98-130 per disease in human and livestock and is one 100000 and most affected persons are in of the hygiene problems in most areas of 10-19 age range, 79% in rural regions and the world especially Mediterranean, 21% in urban areas, in different references middle west including Iran. It is common it has been mentioned that males are in most counties of the world and just 17 affected more than females.6 There aren’t countries have been formally announced as many studies on Brucellosis and its free Brucellosis.1 Brucellosis is a common relationship with climate factors and disease between man and lives tocks elements, but about its epidemiology in which is transmitted from contaminated various regions, many studies are done. animals to man. The causative agent of Maki et al, in an article entitled, brucellosis is from Brucellosis genre with epidemiology and risk factor of small rod-like, Gram-negative, non- Brucellosis in Alexandria, Egypt, have mobile, non-sporulated KV basel. 4 described the trend and diagnosis of risk species can affect man: B. melitensis, factor in Brucellosis in this region. Their B.abortus, B. Suis and B.canis. B.canis is results show that contact with animals and the most invasive and has more virulence. eating ice cream bought from badger It usually affects goat and sometimes sellers are significant in 5% level through sheep, it is mostly considered as cow multi-variable analysis tests with disease. B. suis mostly affects pig. B. canis Brucellosis. Moreover, they mention that results in disease in dogs. Major affection Contact with contaminated animals and resources include livestock (cow), sheep, their products is the most important reason goat, pig, buffalo, horse and dog. The of Brucellosis disease.7 Makita et al, main symbol of this disease is abortion epidemiologically- spatially have studied and bears pre-mature off spring, but in the diagnosed cases of Brucellosis in human, Brucellosis isn’t mostly symbolic Kampala, Uganda and concluded that and special and divided into various affection in females is more than males. clinical types. Traditionally, three types Significant diversity is seen to be 6.8 km have been described: acute, sub- acute and radius from hospital. In various urban chronic. Acute form is when the disease is regions, the most affection cases are seen terminated in 3 months. Continuity of the in suburb areas.8 Bahonar et al, in their disease from one month to one year is study entitled study the effective factor on called subacute and more than a year may Brucellosis affection in Chaharmahal and 99 International Journal of Epidemiologic Research, 2016; 3(2): 98-105. Bakhtiari, Iran, stated that although METHODS contact with livestock and contaminated The present study is in descriptive- products is the most important factor in analytical type. For doing this investigation, Brucellosis affection, climate condition at first, available applied and scientific and ranch type, ranch culture and food resources have been collected and studied. behavior of the people in each region Data of this investigation which is related to a about using livestock products and also 2008-2011 year period includes: data related Pathogens species in each geographical to the number of subject and livestock region alter the pattern of disease affected by Brucellosis which was provided expression. They also showed that from hygiene organization and general consumption of at least one dairy department of veterinary of Chaharmahal and non-pasteurized milk product has a 9 Bakhtiari, Iran. As well as the statistics significant relationship with disease. include average annual climatic parameters Moradi et al, have studied epidemiologic (temperature, precipitation and humidity) condition of 3880 subject affected by were calculated from the Bureau of Brucellosis in Kurdistan, Iran, and Meteorology in the synoptic stations, the concluded that men in villages and house prepared. In this study, data analysis software keeper women in the cities are considered Pearson has been done thus to calculate the as one of the most involved groups and relevance of the patients per year with an Qorveh and Bijar have been known as two 10 annual average climatic parameters that year cities exposed to Brucellosis risk. In SPSS software and the analysis of Pearson general, this disease is considered as a correlation examined the processing for the major problem in livestock and general entire period (Table 1). hygiene in the region where livestock is As well as spatial distribution maps of the income and employment resource. Brucellosis were provided by Geographic Economic consequences of obliterating the Information System (GIS). In this way, the livestock affected by this disease are so incidence rate formula based on the high, resulting in huge remedial costs for number of event Disease in a Specified remedial organization of the country. The period divided the average population size aim of this investigation is to study the of the period and Multiplication 100,000 local diversity of this disease with and for each town separately calculated on regarding to disease index determination the basis of the (Table 2) prepared. in human, determine the high-risk towns in Then Average index diseases gained respect to this disease prevalence, effect of after the index gained standard deviation climate elements temperature, rainfall and and standard deviation away from the moisture on development and prevalence mean low and then once added that based of this disease in the towns of the on data obtained from low-risk and mentioned province. high-risk areas was drawn. 100 Brucellosis 20 Brucellosis 20 Brucellosis 2009 Brucellosis 2008 Entezari Brucellosis Table **Correlation significantis at the 0.01 level (2 M 1 , et al , et : Study the Study 11 1 . 0 S pat N (2 Sig. Pearson
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