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Feline coronavirus (FCoV) is an enveloped, positive-sense RNA virus, which is widespread among feline populations, and can cause a fatal serious disease called feline infectious peritonitis (FIP). According to the differences of antigen and genetic composition, FCoV consists of two genotypes, FCoV I and FCoV II. In this study, we have isolated and identified a FCoV I strain named HL2019. Based on the complete genome of HL2019, phylogenetic analysis showed that HL2019 strain formed in the cluster FCoV I which is more closed to human coronavirus 229E (HCoV 229E) and HCoV NL63, while the FCoV I stains is distantly related to FCoV II strains. Analyzing with RDP4 and Simplot software showed that the virus HL2019 is recombinant by the FCoV I China/ZJU1709 and FCoV I Netherlands/UU16 strains. Furthermore, the pathogenicity of HL2019 was evaluated in 9-12-month-old cats. Two of three challenged cats developed serious clinical signs and died at 28-day postchallenge (dpc). Real-time polymerase chain reaction (PCR) analysis showed that HL2019 has broad tissue tropism, especially in the duodenum with viral load up to 10 copies/mg. In summary, our data show that we have successfully isolated a strain of FCoV I named HL2019 that is highly pathogenic to cats.
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http://dx.doi.org/10.1155/2024/4162458 | DOI Listing |
Front Microbiol
August 2025
State Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China.
Introduction: Feline infectious peritonitis (FIP), caused by feline coronavirus (FCoV), is a highly lethal disease characterized by systemic organ infection in cats. Current challenges of FIP include the absence of definitive diagnostic criteria, effective vaccines, and targeted therapies. Developing a robust genome editing toolkit is therefore critical to unraveling FCoV replication and pathogenesis mechanisms, elucidating viral protein functions, and identifying promising diagnostic and therapeutic targets.
View Article and Find Full Text PDFIn Vivo
August 2025
Department of Veterinary Internal Medicine, College of Veterinary Medicine and Institute for Veterinary Biomedical Science, Kyungpook National University, Daegu, Republic of Korea
Background/aim: Feline infectious peritonitis (FIP) is a fatal disease caused by feline coronavirus (FCoV), manifesting as effusive (wet) or non-effusive (dry) forms. Granulomatous lesions in the gastrointestinal tract, particularly the colon, are rare and pose diagnostic and therapeutic challenges.
Case Report: A 7-year-old castrated male domestic shorthair cat (4.
Pathogens
August 2025
Laboratory of Veterinary Infectious Disease, School of Veterinary Medicine, Kitasato University, Towada 034-8628, Aomori, Japan.
The cross-species spillover of coronaviruses is considered a serious public health risk. Feline coronavirus (FCoV), canine coronavirus (CCoV), and transmissible gastroenteritis virus (TGEV) are all classified under and infect companion animals and livestock. Due to their frequent contact with humans, these viruses pose a potential risk of future cross-species transmission.
View Article and Find Full Text PDFmBio
August 2025
Departments of Microbiology & Immunology and Public & Ecosystem Health, Cornell University, Ithaca, New York, USA.
Alphacoronaviruses are widespread but understudied in comparison to betacoronaviruses. Within the alphacoronaviruses is the species , which comprises distinct viruses of cats, dogs, and pigs, along with a separate species that infects mustelids-as well as other related viruses of pigs and circulating human viruses. High-pathogenicity feline coronavirus (FCoV) is infamous as the cause of feline infectious peritonitis (FIP), existing as two distinct genotypes (types 1 and 2) and transmitted as a low-pathogenicity virus.
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August 2025
Department of Veterinary Biomedical Sciences, College of Veterinary Medicine, Long Island University, Brookville, NY, United States of America.
Background: Feline infectious peritonitis virus (FIPV) is one of cats' most serious viral infections. The FIPV infection induces a complicated syndrome in the affected cats, including immunosuppression and severe inflammatory conditions. Unfortunately, vaccines are unable to provide complete prevention in cats from getting infected with these viral infections.
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