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

Muhammad Asim Khan; Kiran Afshan; Neil D Sargison; Martha Betson; Sabika Firasat; Umer Chaudhry

doi:10.1007/s11686-022-00634-1

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

Muhammad Asim Khan, Kiran Afshan, Neil D Sargison, Martha Betson, Sabika Firasat, Umer Chaudhry

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	Acta Parasitologica
Early online date	22 Nov 2022
DOIs	https://doi.org/10.1007/s11686-022-00634-1
Publication status	E-pub ahead of print - 22 Nov 2022

Keywords / Materials (for Non-textual outputs)

Climatic variables
Dicrocoeliosis
Ecological niches
Goats
Himalayas range
Sheep

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10.1007/s11686-022-00634-1

s11686-022-00634-1Final published version, 3.96 MBLicence: Creative Commons: Attribution (CC-BY)

Cite this

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title = "Spatial Distribution of Dicrocoelium in the Himalayan Ranges: Potential Impacts of Ecological Niches and Climatic Variables",

abstract = "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.",

keywords = "Climatic variables, Dicrocoeliosis, Ecological niches, Goats, Himalayas range, Sheep",

author = "Khan, \{Muhammad Asim\} and Kiran Afshan and Sargison, \{Neil D\} and Martha Betson and Sabika Firasat and Umer Chaudhry",

note = "Funding Information: The research work presented in this paper is part of PhD dissertation of Muhammad Asim Khan. This study is supported by internal research funds of Quaid-i-Azam University, Islamabad Pakistan. Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

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doi = "10.1007/s11686-022-00634-1",

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T1 - Spatial Distribution of Dicrocoelium in the Himalayan Ranges

T2 - Potential Impacts of Ecological Niches and Climatic Variables

AU - Khan, Muhammad Asim

AU - Afshan, Kiran

AU - Sargison, Neil D

AU - Betson, Martha

AU - Firasat, Sabika

AU - Chaudhry, Umer

N1 - Funding Information: The research work presented in this paper is part of PhD dissertation of Muhammad Asim Khan. This study is supported by internal research funds of Quaid-i-Azam University, Islamabad Pakistan. Publisher Copyright: © 2022, The Author(s).

PY - 2022/11/22

Y1 - 2022/11/22

N2 - 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.

AB - 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.

KW - Climatic variables

KW - Dicrocoeliosis

KW - Ecological niches

KW - Goats

KW - Himalayas range

KW - Sheep

U2 - 10.1007/s11686-022-00634-1

DO - 10.1007/s11686-022-00634-1

M3 - Article

C2 - 36418764

SN - 1230-2821

SP - 1

EP - 12

JO - Acta Parasitologica

JF - Acta Parasitologica

ER -

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

Abstract

Keywords / Materials (for Non-textual outputs)

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