Biomaterial Database

Biological diversity among serotype 2 Marek's disease viruses. 1990

R L Witter, and L F Lee, and J M Sharma

USDA-Agricultural Research Service, Regional Poultry Research Laboratory, East Lansing, Michigan 48823.

Selected biological characteristics were determined for 14 low-passage serotype 2 Marek's disease virus (MDV) isolates. Four of these isolates were also tested after extensive serial passage in chicken embryo fibroblast cultures. Observations were made on replication in vitro and in vivo, pathogenicity by in ovo inoculation, antigenicity, and protection against virulent MDV challenge. Among the low-passage isolates, there were some differences in pathogenicity after in ovo inoculation but relatively little difference in other characteristics, with the exception of the HN-1 strain, which replicated more rapidly in cell culture but produced generally lower in vivo responses than other isolates. After extended in vitro passage, isolates replicated much more readily in cell culture and produced lower pathologic responses in vivo than low-passage isolates, as has been reported for serotype 1 isolates. No antigenic differences among isolates were detected, but high-passage isolates induced lower levels of precipitating antibodies than low-passage isolates, indicating a possible reduction in A antigen production. The observed diversity associated with strain and passage level may be of value in the selection of optimum vaccine strains.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008380	Marek Disease	A transmissible viral disease of birds caused by avian herpesvirus 2 (HERPESVIRUS 2, GALLID) and other MARDIVIRUS. There is lymphoid cell infiltration or lymphomatous tumor formation in the peripheral nerves and gonads, but may also involve visceral organs, skin, muscle, and the eye.	Fowl Paralysis,Marek's Disease,Fowl Paralyses,Mareks Disease,Paralyses, Fowl,Paralysis, Fowl
D008381	Herpesvirus 2, Gallid	The type species of the genus MARDIVIRUS in the family HERPESVIRIDAE. It is the etiologic agent of MAREK DISEASE, infecting domestic fowl and wild birds.	Fowl Paralysis Virus,Marek's Disease Herpesvirus 1,Marek's Disease Virus Serotype 1,Neurolymphomatosis Virus,Gallid Herpesvirus 2,Herpesvirus 2 (gamma), Gallid,Marek Disease Herpesvirus 1,Fowl Paralysis Viruses,Neurolymphomatosis Viruses,Paralysis Virus, Fowl,Paralysis Viruses, Fowl
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
D004797	Enzyme-Linked Immunosorbent Assay	An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed.	ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D005260	Female		Females
D005455	Fluorescent Antibody Technique	Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.	Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein
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