牛白血病病毒:起源,流行,遗传多样性,危险因素和控制策略
Yuxi Zhao1,2,3, Jiandong Wang3, Jianguo Chen1,2
1National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, College of Veterinary Medicine, The Cooperative Innovation Centre for Sustainable Pig Production, Huazhong Agricultural University, Wuhan 430070, China.
Animals : an open access journal from MDPI
|May 14, 2025
概括
牛白血病病毒 (BLV) 引起动物性牛白血病,这是一种广泛的牛癌症. 了解 BLV 的意思
科学领域:
- 兽医病毒学 兽医病毒学
- 在瘤学瘤学.
- 流行病学 流行病学
背景情况:
- 牛白血病病毒 (BLV),一种Deltaretrovirus,导致动物性牛白血病 (EBL),牛中最常见的癌症.
- BLV与人类T细胞白血病病毒 (HTLVs) 有相似之处,是潜在的动物病原体,尽管人类的风险正在调查中.
- 病毒通常呈现在临床下,使检测复杂化,并使静默的群体传播成为可能,需要强有力的监测.
研究的目的:
- 提供关于牛白血病病毒 (BLV) 的全面审查.
- 巩固关于BLV的起源,演变,流行病学,风险因素和控制策略的知识.
- 为开发有效的BLV疫苗,诊断和控制措施提供信息.
主要方法:
- 文献综述和关于牛白血病病毒 (BLV) 的现有研究的综合.
- 对BLV和相关逆转录病毒的基因组和生物数据的分析.
- 检查流行病学数据和控制计划结果.
主要成果:
- 尽管有根除努力,但BLV在全球范围内仍然非常普遍,这凸显了控制方面的挑战.
- 亚临床感染很常见,在牛群中促进未被检测到的传播.
- 一种BLV疫苗是减少感染发生率和经济损失的关键发展.
结论:
- 充分了解BLV对于开发有效的疫苗和控制策略至关重要.
- 需要采用综合方法来管理BLV的流行和减轻经济影响.
- 持续的研究和监测对于控制BLV和评估动物感染潜力至关重要.
相关概念视频
Retrovirus Life Cycles
45.4K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
45.4K
Viral Mutations
32.1K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.1K
Leaky Scanning
5.0K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.0K
Mechanisms of Retrovirus-induced Cancers
5.0K
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
5.0K
Rous Sarcoma Virus (RSV) and Cancer
4.9K
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
4.9K
Viral Recombination
23.1K
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
23.1K


