The study of virus variation covers a wide range of phenomena. At one extreme are the
comprehensive differences that allow viruses to be arranged taxonomically into different …

After 2 introductory chapters (toward an evolutionary biology of viruses (SS Morse), driving
forces in evolution: an analysis of natural selection (E. Mayr)), this book is divided into 4 …

Infection of cattle with the bovine leukemia virus (BLV) results in a strong permanent
antibody response to the BLV antigens some weeks after infection. However, cattle may …

Isolates of human T-lymphotropic virus type I (HTLV-I) were phylogenetically analyzed from
native inhabitants in India and South America (Colombia and Chile) and from Ainu …

To investigate the origin of the African PTLV-I virus, we phylogenetically analyzed the
available HTLV-I and STLV-I strains. We also attempted to date the presumed interspecies …

Using two sets of nucleotide sequences of the human and simian T-cell leukemia/lymphoma
virus type I (HTLV-I/STLV-I), one consisting of 522 bp of the env gene from 70 viral strains …

To gain new insights on the origin, evolution, and modes of dissemination of human T-cell
leukemia virus type I (HTLV-1), we performed a molecular analysis of 58 new African HTLV …

Six new HTLV-I strains from seroindeterminate individuals were analyzed: four from Gabon,
one from a Mbuti Efe pygmy in Congo (formerly Zaire), and one from a Congolese patient …

Strongyloidiasis and HTLV-I (human T-lymphotropic virus-1) are important infections that are
endemic in many countries around the world with an estimated 370 million infected with …

Introduction Human T-lymphotropic virus 2 (HTLV-2) has been described for more than 30
years as an endemic infection in Brazilian indigenous populations, with its occurrence …