• In recent years, cases of avian leukosis virus subgroup J (ALV-J) infection and tumors in commercial layer chickens and breeders of egg-type chickens have been emerging in the People's Republic of China. (cdc.gov)
  • Release of group-specific antigen into the extracellular medium was independent of subgroup or strain of avian leukosis or Rous sarcoma virus. (microbiologyresearch.org)
  • The ALV-B dtec-RT-qPCR comprises a series of species-specific targeted reagents designed for detection of all serotypes of Avian leukosis virus subgroup B species by using qPCR. (geneticpcr.com)
  • Broiler parent chicks from were hatched from a grandparent flock known to be infected with avian leukosis virus subgroup J (ALV-J) and sampled at 2-4 week intervals from hatch to 60 weeks. (usda.gov)
  • The study, published in Genetics Selection Evolution , focused on Avian Leukosis Virus subgroup E (ALVE) infections and could be of greatest benefit to smallholder farms in developing countries. (wattagnet.com)
  • Subgroup J of avian leukosis virus (ALV J) was firstly isolated from commercial broiler flocks with significant clinical symptoms in Jining city of Shandong province in China by inoculating chicken embryo fibroblast cells (CEF) and using pathologic diagnosis. (cnki.net)
  • The subgroup A to E avian sarcoma and leukosis viruses (ASLVs) are highly related and are thought to have evolved from a common ancestor. (elsevierpure.com)
  • The leukosis/sarcoma (L/S) group of diseases comprise of a variety of transmissible benign and malignant neoplasms, such as lymphoid, myeloid and erythroid leukosis, caused by avian leukosis viruses (ALV), belonging to the family Retroviridae . (caister.com)
  • Multiple group specific antigen components of avian tumor viruses detected with chicken and hamster sera. (microbiologyresearch.org)
  • Complement-fixing antigens in tissue cultures of avian leukosis viruses. (microbiologyresearch.org)
  • Polypeptides of avian RNA tumor viruses. (microbiologyresearch.org)
  • Origin of group-specific antigen of chicken leukosis viruses. (microbiologyresearch.org)
  • Fluorescent antibody studies of viruses of the avian leukosis complex. (microbiologyresearch.org)
  • I. Avian leukemia-sarcoma viruses. (microbiologyresearch.org)
  • Immunofluorescent studies of group-specific antigen of the avian sarcoma-leukosis viruses. (microbiologyresearch.org)
  • Avian leukosis virus belongs to a family of viruses called retroviruses, single-stranded RNA enveloped viruses. (geneticpcr.com)
  • Poultry viruses, such as avian pox and Newcastle disease (ND), are known to have a negative impact on poultry reproductive performance 1 - 4 . (scialert.net)
  • For instance, avian pox viruses, DNA viruses, infect a wide range of domestic poultry causing a drop in egg production and impaired reproductive efficiency 3 , 4 . (scialert.net)
  • Studies conducted in the 1960s found that certain live poultry viruses, like fowl pox 17 , 18 , ND 8 , Rous sarcoma 19 and avian leukosis 20 , following either natural infection or vaccination, increased the occurrence of parthenogenesis in chickens 19 and turkeys 17 , 18 . (scialert.net)
  • These viruses use distinct cell surface proteins as receptors to gain entry into avian cells. (elsevierpure.com)
  • ALV-J was first isolated from meat-type chickens with myeloid leukosis in 1988. (cdc.gov)
  • The major group-specific antigen (gs-a) of avian leukoviruses was detected by radioimmunoassay in extracellular medium of all embryonic cultures prepared from infected chickens. (microbiologyresearch.org)
  • Embryos of birds not carrying an avian leukosis virus infection and of chickens from a leukosis-free flock could thus clearly be distinguished from infected ones. (microbiologyresearch.org)
  • Domestic chickens activate a piRNA defense against avian leukosis virus. (rochester.edu)
  • Chickens with avian leukosis virus are fit for the market, said the U.S. Department of Agriculture (USDA) in a shocking statement . (peta.org)
  • In addition, genome-edited chickens have been bred which are resistant to the avian leukosis virus. (feedstuffs.com)
  • The variant of a certain protein leading to resistance to the avian leukosis virus does not occur in chickens, but is found, for example, in quails. (feedstuffs.com)
  • The phenomenon has been observed in a variety of avian species, including chickens 9 , turkeys 10 and quail 11 . (scialert.net)
  • The National Chicken Council petitioned FSIS to allow chickens with suspected avian leukosis lesions to enter the food supply chain after trimming. (usfoodimports.com)
  • Expression of Rous sarcoma virus-derived retroviral vectors in the avian blastoderm: potential as stable genetic markers. (org.ua)
  • While A and B subgroups are primarily associated with lymphoid leukosis, ALV-J primarily induces myeloid leukosis, currently a major problem in countries such as China. (caister.com)
  • After hatch, virtually all hens became infected and about 20% developed tumors, mostly myeloid leukosis. (usda.gov)
  • Lack of relationship between infection with avian leukosis virus and the presence of COFAL antigen in chick embryos. (microbiologyresearch.org)
  • This supports the idea that ALVEs have a role in regulating host responses to further infection by Avian Leukosis Virus, and therefore may have a beneficial effect in the genome," Smith explained. (wattagnet.com)
  • Avian sarcoma leukosis virus is characterized by a wide range of tumors, the most common of which are lymphomas. (wikipedia.org)
  • Lymphoid leukosis is the most common form of this disease and with typical presentation of gradual onset, persistent low mortality, and neoplasia of the bursa. (wikipedia.org)
  • Lymphoid leukosis has a worldwide distribution, and is most commonly found in birds 16 weeks or older. (wikipedia.org)
  • Lymphoid leukosis was eradicated in primary breeders in the 1980s and 1990s which dramatically reduced the incidence of the disease in commercial laying hens. (wikipedia.org)
  • Avian Virology: Current Research and Future Trends (Edited by: Siba K. Samal). (caister.com)
  • The subgroups evolved to utilize difference cellular receptors to gain entry into avian cells due to the host developing resistance to viral entry. (wikipedia.org)
  • In the accompanying article, we presented experiments that demonstrate that polypeptides of various sizes could be efficiently displayed on the envelope glycoproteins of a eukaryotic virus, avian leukosis virus (ALV), and the displayed polypeptides could efficiently attach to cognate receptors without interfering with viral attachment and entry into susceptible cells. (elsevierpure.com)
  • Endogenous retrovirus sequences were detected by using a 32 P-labeled avian leukosis viral RNA probe. (princeton.edu)
  • RNA from an avian sarcoma virus was used to detect cellular sequences (sarc) homologous to the viral transforming gene (src). (princeton.edu)
  • USDA's FSIS and other health agencies have recognized that avian leukosis is not food safety concern and is not transmissible to humans. (chickencheck.in)
  • Integration of avian sarcoma virus DNA in chicken cells. (wikidata.org)
  • Instead of Kentucky-fried or tacos con pollo, they're serving up "Chicken รก la Avian Leukosis. (jimhightower.com)
  • Avian leukosis virus (ALV) is one of causing agents for neoplastic syndrome in commercial chicken farms. (ugm.ac.id)
  • And now, thanks to a new rule the Trump administration may propose, chicken with an avian virus would be for sale in stores. (peta.org)
  • Thanks to the avian virus, a chicken farm in the U.K. killed over 400 birds earlier this month. (peta.org)
  • Jim Hightower says, "Trump Dishes Up 'Chicken A La Avian Leukosis. (issuesandalibis.org)
  • The radioimmunoassay of the group-specific antigen seems to be well suited to complement the COFAL (complement fixation avian leukosis) and RIF (resistance inducing factor) tests in the detection of leukosis virus in infected material. (microbiologyresearch.org)
  • Appropriate in vivo expression of a muscle-specific promoter by using avian retroviral vectors for gene transfer [corrected]. (org.ua)
  • [18] Cosset FL, Legras C, Thomas JL, Molina RM, Chebloune Y, Faure C, Nigon VM, Verdier G. Improvement of avian leukosis virus (ALV)-based retrovirus vectors by using different cis-acting sequences from ALVs. (org.ua)
  • [19] Benchaibi M, Mallet F, Thoraval P, Savatier P, Xiao JH, Verdier G, Samarut J, Nigon V. Avian retroviral vectors derived from avian defective leukemia virus: role of the translational context of the inserted gene on efficiency of the vectors. (org.ua)
  • Parthenogenesis is the spontaneous development of an embryo from an avian egg without going through the usual process of fertilization 7 , 8 . (scialert.net)
  • Characterization of a 105,000 molecular weight gag-related phosphoprotein from cells transformed by the defective avian sarcoma virus PRCII. (wikidata.org)
  • Avian leukosis is a very rare virus that can form lesions in the internal organs of a bird, such as the liver or spleen. (chickencheck.in)
  • Current regulations require poultry with avian leukosis lesions to be condemned. (usfoodimports.com)
  • In addition to piRNAs that protect the germ-line genome from transposon activation, mammals and avian produce a distinct and abundant set of non-repetitive piRNA sequences whose function is unknown. (rochester.edu)
  • [4] Aronoff R, Hajjar AM, Linial ML. Avian retroviral RNA encapsidation: reexamination of functional 5' RNA sequences and the role of nucleocapsid Cys-His motifs. (org.ua)
  • However, the movement was unsuccessful in maintaining leukosis-free flocks. (wikipedia.org)
  • The avian leukosis virus can lead to severe diseases and severe growth and laying depression in poultry," said Schusser. (feedstuffs.com)
  • RNA species obtained from clonal lines of avian sarcoma and from avian leukosis virus. (wikidata.org)
  • Genetic structure, transforming sequence, and gene product of avian sarcoma virus UR1. (wikidata.org)
  • Avian leukosis virus have been divided into 10 envelope subgroups, A through J, based on host range, receptor interference patterns, and neutralization by antibodies. (geneticpcr.com)
  • [6] Katz RA, Terry RW, Skalka AM. A conserved cis-acting sequence in the 5' leader of avian sarcoma virus RNA is required for packaging. (org.ua)
  • Identification of a sequence likely to be required for avian retroviral packaging. (org.ua)
  • Detection of a protein of avian leukoviruses in uninfected chick cells by RIA. (microbiologyresearch.org)
  • Tyrosine-specific protein kinase activity associated with p105 of avian sarcoma virus PRCII. (wikidata.org)
  • [7] Knight JB, Si ZH, Stoltzfus CM. A base-paired structure in the avian sarcoma virus 5' leader is required for efficient encapsidation of RNA. (org.ua)