Spatial Distribution of Dicrocoelium in the Himalayan Ranges: Potential Impacts of Ecological Niches and Climatic Variables.

Autor: Khan MA; Department of Zoology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan., Afshan K; Department of Zoology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan. kafshan@qau.edu.pk., Sargison ND; Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary Centre, University of Edinburgh, Edinburgh, EH25 9RG, UK., Betson M; School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Daphne Jackson Rd, Guildford, GU2 7AL, UK., Firasat S; Department of Zoology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan., Chaudhry U; School of Veterinary Medicine, Faculty of Health and Medical Sciences, University of Surrey, Daphne Jackson Rd, Guildford, GU2 7AL, UK. u.chaudhry@surrey.ac.uk.; Royal (Dick) School of Veterinary Studies, Easter Bush Veterinary Centre, University of Edinburgh, Edinburgh, EH25 9RG, UK. u.chaudhry@surrey.ac.uk.
Jazyk: angličtina
Zdroj: Acta parasitologica [Acta Parasitol] 2023 Mar; Vol. 68 (1), pp. 91-102. Date of Electronic Publication: 2022 Nov 22.
DOI: 10.1007/s11686-022-00634-1
Abstrakt: Purpose: Dicrocoeliosis can be an important cause of production loss in ruminants due to the cost of liver condemnation at slaughter. The aim of the present study was to determine the prevalence of Dicrocoelium infection and to predict the ecological niches and climatic variables that support dicrocoeliosis in the Himalayan ranges of Pakistan.
Methods and Results: Dicrocoelium was detected in 33 of 381 liver samples and 238 of 6060 blood samples taken from sheep and goat herds in the area. The prevalence of dicrocoeliosis was higher in sheep than in goats and highest in females aged more than 3 years. An environmental risk map was created to predict active zones of transmission and showed the highest probability values in central parts of the Chitral district in the northwest of Pakistan. Climatic variables of the mean monthly diurnal temperature range (Bio2), annual precipitation (Bio12), and normalised difference vegetation index (NDVI) were found to be significantly (p < 0.05) associated with the presence of Dicrocoelium infection.
Conclusion: Together, the findings of this study demonstrate the most suitable ecological niches and climatic variables influencing the risk of dicrocoeliosis in the Himalayan ranges of Pakistan. The methods and results could be used as a reference to inform the control of dicrocoeliosis in the region.
(© 2022. The Author(s).)
Databáze: MEDLINE
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