Biomaterial Database

Epidemiology of reticuloendotheliosis virus in broiler breeder flocks. 1985

R L Witter, and D C Johnson

Six broiler breeder flocks from two companies in Mississippi were tested at intervals for reticuloendotheliosis (RE) virus infection. Virus was isolated and antibody demonstrated in all six flocks. Infection was first detected at ages ranging from 13 to 47 weeks. Studies showed that neither congenital transmission from grandparent flocks nor treatment with contaminated vaccines was a likely source of infection; thus, exposure to RE virus was assumed to come from the environment. Virus was isolated from litter samples from two of the flocks, but no specific environmental infection source was identified. Infection rates of flocks differed between the two companies. Although adequate controls were lacking, no performance problems due to RE virus infection were apparent in breeder or broiler progeny flocks. However, the RE viruses isolated from these flocks were immunosuppressive and oncogenic when inoculated into day-old chicks. A moderate (3-16%) incidence of neoplasms was induced by contact exposure to these field isolates in the laboratory.

UI	MeSH Term	Description	Entries
D008922	Mississippi	State bounded on the north by Tennessee, on the east by Alabama, on the south by Louisiana and Gulf of Mexico, and on the west by Arkansas and Louisiana.
D011201	Poultry Diseases	Diseases of birds which are raised as a source of meat or eggs for human consumption and are usually found in barnyards, hatcheries, etc. The concept is differentiated from BIRD DISEASES which is for diseases of birds not considered poultry and usually found in zoos, parks, and the wild.	Disease, Poultry,Diseases, Poultry,Poultry Disease
D012087	Reoviridae	A family of unenveloped RNA viruses with cubic symmetry. The twelve genera include ORTHOREOVIRUS; ORBIVIRUS; COLTIVIRUS; ROTAVIRUS; Aquareovirus, Cypovirus, Phytoreovirus, Fijivirus, Seadornavirus, Idnoreovirus, Mycoreovirus, and Oryzavirus.	Aquareovirus,Cypovirus,Cytoplasmic Polyhedrosis Viruses,Fijivirus,Idnoreovirus,Mycoreovirus,Oryzavirus,Phytoreovirus,Reoviruses, Aquatic,Respiratory Enteric Orphan Viruses,Seadornavirus,Aquareoviruses,Aquatic Reovirus,Aquatic Reoviruses,Cypoviruses,Cytoplasmic Polyhedrosis Virus,Fijiviruses,Idnoreoviruses,Mycoreoviruses,Oryzaviruses,Phytoreoviruses,Polyhedrosis Virus, Cytoplasmic,Polyhedrosis Viruses, Cytoplasmic,Reovirus, Aquatic,Seadornaviruses
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D002642	Chick Embryo	The developmental entity of a fertilized chicken egg (ZYGOTE). The developmental process begins about 24 h before the egg is laid at the BLASTODISC, a small whitish spot on the surface of the EGG YOLK. After 21 days of incubation, the embryo is fully developed before hatching.	Embryo, Chick,Chick Embryos,Embryos, Chick
D002645	Chickens	Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA.	Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D000914	Antibodies, Viral	Immunoglobulins produced in response to VIRAL ANTIGENS.	Viral Antibodies
D012190	Retroviridae	Family of RNA viruses that infects birds and mammals and encodes the enzyme reverse transcriptase. The family contains seven genera: DELTARETROVIRUS; LENTIVIRUS; RETROVIRUSES TYPE B, MAMMALIAN; ALPHARETROVIRUS; GAMMARETROVIRUS; RETROVIRUSES TYPE D; and SPUMAVIRUS. A key feature of retrovirus biology is the synthesis of a DNA copy of the genome which is integrated into cellular DNA. After integration it is sometimes not expressed but maintained in a latent state (PROVIRUSES).	Leukemogenic Viruses,Leukoviruses,Oncornaviruses,Oncovirinae,Oncoviruses,Oncoviruses, Type C,RNA Tumor Viruses,Retroviruses,Type C Oncoviruses,C Oncovirus, Type,C Oncoviruses, Type,Leukemogenic Virus,Leukovirus,Oncornavirus,Oncovirus,Oncovirus, Type C,RNA Tumor Virus,Retrovirus,Tumor Virus, RNA,Tumor Viruses, RNA,Type C Oncovirus,Virus, Leukemogenic,Virus, RNA Tumor,Viruses, Leukemogenic,Viruses, RNA Tumor
D012192	Retroviridae Infections	Virus diseases caused by the RETROVIRIDAE.	Retrovirus Infections,Infections, Retroviridae,Infections, Retrovirus,XMRV Infection,Xenotropic MuLV-related Virus Infection,Xenotropic Murine Leukemia Virus-related Virus Infection,Infection, Retroviridae,Infection, Retrovirus,Infection, XMRV,Infections, XMRV,Retroviridae Infection,Retrovirus Infection,XMRV Infections,Xenotropic MuLV related Virus Infection,Xenotropic Murine Leukemia Virus related Virus Infection