Abdullah Sam 
California encephalitis virus has been recognized as a geographically extensive .annual, warm-season, epidemic, febrile central nervous system disease.Only since a sensitive CF antigen for the La Crosse strain was recently made available for routine serologic study of sera collected from patients who suffered febrile CNS signs that were demonstrated not to be due to WEE, EEE, … Read more
Venezuelan Equine Encephalitis is a Subsequent study of the virus by Casals and others established an antigenic relationship with Western and Eastern equine encephalitis viruses that places it, along with these, in arbovirus group A. Although no etiologic association with human disease was recognized at that time, retrospective epidemiologic and serologic assessments indicate that these … Read more
Eastern equine encephalitis (EEE) virus was first isolated in 1933 by Ten Broeck and Merrill from brains of horses that died in an extensive epizootic in Delaware, Maryland, New Jersey, and Virginia. The first isolations from man were obtained by Fothergill and Webster from brain tissue of fatal cases in the 1938 epidemic in Massachusetts. … Read more
Western equine encephalomyelitis (WEE) virus was first isolated by Meyer in 1930 from the brain of a paralyzed horse in the San Joaquin Valley of California. Howitt was the first to recover it from human tissue and blood in 1938, at which time it became evident from serologic studies of suspected cases that human encephalitis … Read more
Sandfly fever is a viral disease characterized by fever, headache, ocular pain, conjunctiva injection, and malaise followed by complete recovery. it is also called Pappataci Fever It occurs during the hot, dry season in parts of the European and African littoral of the Mediterranean, Asia Minor, the Russian shores of the Black Sea, Pakistan, and … Read more
Colorado tick fever is an acute, tick-transmitted viral disease that occurs throughout the Rocky Mountain area, and is characterized by a biphasic febrile course and profound leukopenia. Etiology. Colorado tick fever virus is a member of the arbovirus group. The virus contains RNA. is small in size, and has not yet been shown be related … Read more
