Seroepidemiological study of Crimean-Congo Hemorrhagic Fever (CCHF) in sheep in Lorestan province, Western Iran

Document Type : Original Articles

Authors

1 Department of Communicable Diseases Control and Prevention, Health Center, Lorestan University of Medical Sciences, Khorramabad, Iran.

2 Département de Microbiologie-Infectiologie et d'Immunologie, UniversitéLaval, QuébecCity, Québec, Canada.

3 Département de Microbiologie-Infectiologie et d'Immunologie, UniversitéLaval, QuébecCity, Québec, Canada. Pasteur Institute of Shanghai, China.

4 Pasteur Institute of Iran, Tehran, Iran.

5 Department of Statistics, School of Public Health, Lorestan University of Medical Sciences, Khorramabad, Iran.

6 Department of Epidemiology and Biostatistics, Research Centre for Emerging and Reemerging Infectious Diseases, Pasteur Institute of Iran, Tehran, Iran.

7 Deputy of Veterinary, Khorramabad, Iran.

8 Hepatitis Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran.

9 Student Research Committee, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran

10.22092/ari.2024.363530.2862

Abstract

The aim of the current study is to investigate the sero-prevalence of CCHF among local and imported sheep in Lorestan province. The study population consisted of sheep, which were selected randomly from all counties of the province and were evaluated for the presence of IgG against the CCHF virus (CCHFV) by the enzyme-linked immunosorbent assay (ELISA) method. Out of 330 sheep, 57 sheep (17.27%) had positive serology. The highest infection was seen in Borujerd (82.14%) and Alashtar (73.08%). No positive infection was recorded from Aligudarz, Doroud and Kuhdasht. Sheep that came from other provinces had significantly higher seropositive rates compared to native sheep (36.84% vs. 16.08%) (P = 0.029). The results of this study indicate that CCHF exists in sheep in some counties of Lorestan province and the risk of transmission of the disease to people exposed to this livestock is a serious threat. The publication of these results can be useful for sensitizing the relevant authorities in the medical and veterinary sciences sectors, providing facilities and required equipment for controlling and preventing the disease. Further studies on the rest of the livestock and ticks and the study of the seroprevalence of disease in human is necessary in order to clarify the complete epidemiology of the disease. Due to the high prevalence of infection in livestock in Borujerd, Alashtar, Nurabad, and Doroud, the Department of Veterinary Medicine, the University of Medical Sciences, and other relevant departments should implement anintervention program for disease in these counties. In addition, due to the prevalence of infection in imported livestock to the province, it is also necessary to take measures to prevent the entry of livestock in the province and to ensure that livestock purchases and sales carried out under the supervision of the Veterinary Office.

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