Isolation of feline panleukopenia virus from Yanji of China and molecular epidemiology from 2021 to 2022
- Author:
Haowen XUE
1
;
Chunyi HU
;
Haoyuan MA
;
Yanhao SONG
;
Kunru ZHU
;
Jingfeng FU
;
Biying MU
;
Xu GAO
Author Information
- Publication Type:Original Article
- From:Journal of Veterinary Science 2023;24(2):e29-
- CountryRepublic of Korea
- Language:English
-
Abstract:
Background:Feline panleukopenia virus (FPV) is a widespread and highly infectious pathogen in cats with a high mortality rate. Although Yanji has a developed cat breeding industry, the variation of FPV locally is still unclear.
Objectives:This study aimed to isolate and investigate the epidemiology of FPV in Yanji between 2021 and 2022.
Methods:A strain of FPV was isolated from F81 cells. Cats suspected of FPV infection (n = 80) between 2021 and 2022 from Yanji were enrolled in this study. The capsid protein 2 (VP2) of FPV was amplified. It was cloned into the pMD-19T vector and transformed into a competent Escherichia coli strain. The positive colonies were analyzed via VP2 Sanger sequencing. A phylogenetic analysis based on a VP2 coding sequence was performed to identify the genetic relationships between the strains.
Results:An FPV strain named YBYJ-1 was successfully isolated. The virus diameter was approximately 20–24 nm, 50% tissue culture infectious dose = 1 × 10 −4.94 /mL, which caused cytopathic effect in F81 cells. The epidemiological survey from 2021 to 2022 showed that 27 of the 80 samples were FPV-positive. Additionally, three strains positive for CPV-2c were unexpectedly found. Phylogenetic analysis showed that most of the 27 FPV strains belonged to the same group, and no mutations were found in the critical amino acids.
Conclusions:A local FPV strain named YBYJ-1 was successfully isolated. There was no critical mutation in FPV in Yanji, but some cases with CPV-2c infected cats were identified.
