Publications by authors named "Chenyan Sheng"
Mink circovirus disease caused by (MiCV) is a serious infectious disease of mink that has become prevalent in recent years in China, severely affecting the reproductive performance of mink and causing significant economic losses to farms. To date, there have been few studies on MiCV, its pathogenic mechanism is not clear, and there is no effective vaccine or drug to prevent and control the disease. Therefore, it is necessary to establish a rapid and reliable molecular diagnostic method, which would aid future studies of this novel virus.
View Article and Find Full Text PDFBovine viral diarrhea virus (BVDV) is the causative agent of bovine viral diarrhea. It can infect cattle, sheep, pigs, and other animals, causing diarrhea, miscarriage, and stillbirth, among other symptoms, and it can result in huge economic losses to animal husbandry. There are reports on BVDV infection rates in sheep and goat herds from all over the world and this meta-analysis aimed to evaluate the prevalence of and risk factors for BVDV in sheep and goats.
View Article and Find Full Text PDFBluetongue is a viral disease transmitted by the bite of bloodsucking insects, which mainly occurs in sheep, goats, and cattle. Bluetongue is characterized by fever, leukopenia, and severe catarrhal inflammation of the oral and gastrointestinal mucosa. The present study aimed to evaluate and analyze the prevalence of bluetongue and its associated risk factors in sheep and goats in China.
View Article and Find Full Text PDFArticle Synopsis
- Eimeria spp. causes coccidiosis, a disease that significantly weakens livestock and can result in their death, leading to major economic losses, particularly in the cattle industry.
- This review is the first systematic analysis of how prevalent Eimeria infections are in cattle across mainland China, highlighting data from 46 articles that revealed prevalence rates varying from 4.6% to 87.5%.
- The study found that the infection rate has decreased over the years, from 57.9% before 2000 to 25.0% after 2015, but remains a concern, suggesting that prevention strategies should prioritize better detection in calves within intensive farming systems.
Prevalence of in Pigs in China from 1985 to 2020: A Systematic Review and Meta-Analysis.
Vector Borne Zoonotic Dis
July 2021
Article Synopsis
- A systematic review and meta-analysis were conducted to assess the prevalence of a harmful gram-negative microorganism in swine in China, gathering data from 72 publications between 1985 and 2020.
- The overall prevalence was found to be 22.48%, with a notable increase in southern China (30.97%) compared to northern China (10.79%), and the highest prevalence recorded in Hubei province (36.23%).
- The study suggests improved detection methods in breeding pigs, particularly those with reproductive disorders, and recommends controlling environmental factors in large-scale farms to mitigate future infections.
Article Synopsis
- Bovine leukemia is a contagious tumor disease in cattle caused by the bovine leukemia virus (BLV), which is prevalent in many regions and poses potential risks to animal and human health.
- A meta-analysis of 35 studies in China from 1983-2019 found a 10% prevalence rate of BLV among 34,954 tested cattle, with significant differences based on factors like sampling year, age, and detection methods.
- The research suggests a higher prevalence in cattle sampled before 1985 and aged 3-5 years, recommending increased testing and the use of methods like PCR to better control and prevent the disease.
Porcine circovirus type 2 (PCV2) causes infectious diseases in pigs leading to considerable economic losses in the pig industry. To prevent and control PCV2 infections, is important to understand the prevalence and geographical distribution of the virus. We performed the first systematic review and meta-analysis to estimate the prevalence of PCV2 in China.
View Article and Find Full Text PDF