THE PATTERN OF CONGENITAL TRANSMISSION OF AN AVIAN LEUKOSIS VIRUS

The pattern of congenital transmission of an avian lekosis virus.

It was recently reported that cells derived from some chick embryos are highly resistant to infection with Rous sarcoma virus (RSV) when challenged in vitro.' A virus was isolated from the resistant cells which induced resistance to RSV in chick embryo cells. Although the virus was named RIF, an acronym for "resistance inducing factor," it proved to be indistinguishable from the virus of viscer...

Avian Leukosis Virus

Ultrastructural studies of chick embryo cells morphological ly altered by strain MC29 avian leukosis virus revealed marked and characteristic differences from normal cells and cells al tered by infection with other avian tumor viruses. Such differ ences were manifest in part in the cytoplasm by high content of free ribosomes, poorly developed rough endoplasmic reticu lum, frequent fat droplets,...

the role of russia in transmission of energy from central asia and caucuses to european union

پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...

Rapid induction of hypothyroidism by an avian leukosis virus.

Infection of 10-day chicken embryos with an avian leukosis virus, RAV-7, resulted in hypothyroidism within 3 weeks posthatching. Histological examination of the thyroids from infected chickens showed an extensive infiltration of lymphoblastoid cells by 7 days posthatching. Areas resembling germinal centers were present in the thyroids of infected chickens by 3 weeks posthatching. Examination of...

Avian lymphoid leukosis: Virus-like particles in kidney Cells