China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (10): 4179-4187.doi: 10.16431/j.cnki.1671-7236.2023.10.032

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Detection of Lumpy Skin Disease Virus in Cattle and Investigation of Virus Carried by Midges and Mosquitoes

LI Nan1, MENG Jinxin1, WANG Jiannie2, HE Yuwen1, YANG Shaochang3, LYU Shunyan4, WANG Jinglin1   

  1. 1. Yunnan Tropical and Subtropical Animal Virus Diseases Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming 650224, China;
    2. Liujingyizu Township Agriculture Integrated Service Center, Wenshan 663012, China;
    3. Shuangjiang County Animal Husbandry and Veterinary Technology Promotion Center, Lincang 677399, China;
    4. Dongchuan District Center for Animal Disease Control and Prevention, Kunming 654100, China
  • Received:2023-05-05 Online:2023-10-05 Published:2023-09-26

Abstract: 【Objective】 This study was aimed to understand the virus-carrying status of infected cattle with Lumpy skin disease virus (LSDV) under natural infection and the potential vectors of the virus,so as to provide reference for the prevention and control of lumpy skin disease.【Method】 The different tissue types of specimens were collected from cattle suspected infected with LSDV in Wenshan city,Yunnan province during July 2021.The midges and mosquitoes were collected from cattle feedlots which suspected infected with LSDV in Kunming,Wenshan city and Shuangjiang county,Yunnan province in August 2020 and July 2021 to August 2021,respectively,and the morphological identification was performed.The nucleic acid of LSDV in different tissue types of specimens of infected cattle and midges and mosquitoes were detected by Real-time quantitative PCR.PCR amplification and sequencing of the skin lesions specimens were carried out with specific primer pair of LSDV127 gene.The nucleotide homology and phylogenetic analysis were performed by DNAStar and Mega 6.0 softwares.【Result】 The test of LSDV in whole blood,serum,nasal swab and skin lesion specimens of three infected cattle were positive,and the signals of LSDV amplification curve were the strongest in skin lesion specimens.In addition,the result of LSDV127 gene sequence analysis showed that three positive of nucleic acid of LSDV in skin lesion specimens were 100% homogeneity,and had the closer genetic relationship and clustered together with other LSDV which isolated from Russia,Thailand,Vietnam and South Africa,and showed 99.7%-100% homogeneity.A total of 4 822 midges specimens were trapped and identified constituting 3 different species including C.tainanus,C.jacobsoni and C.oxystoma,as well as 150 specimens of mosquitoes. No specimens of midges and mosquitoes tested were positive for nucleic acid of LSDV.【Conclusion】 These results suggested that the different parts such as blood,nasal secretions and skin lesions of cattle which naturally infected with LSDV might provide a plentiful source of pathogens for arthropod vectors to acquire and spread LSDV,and it was necessary to further investigate whether arthropod vectors such as midges and mosquitoes were involved in the transmission of local LSDV.

Key words: Lumpy skin disease virus (LSDV); midge; mosquito; sequence analysis

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