The 2002 introduction of West Nile virus into Harris County, Texas, an area historically endemic for St. Louis encephalitis. 2004

Kristy M Lillibridge, and Ray Parsons, and Yvonne Randle, and Amelia P A Travassos da Rosa, and Hilda Guzman, and Marina Siirin, and Taweesak Wuithiranyagool, and Christina Hailey, and Stephen Higgs, and Adil A Bala, and Rhia Pascua, and Tamra Meyer, and Dana L Vanlandingham, and Robert B Tesh
Center for Infectious Diseases, School of Public Health, University of Texas Health Science Center, Houston, Texas 77030, USA.

Harris County, Texas, is an endemic area of St. Louis encephalitis (SLE); and an active surveillance program that monitors SLE virus activity in mosquitoes, birds, and humans has been in place there for the past 28 years. In June of 2002, West Nile (WN) virus appeared in Houston and quickly spread throughout the region. This report describes the results of 12 years of SLE surveillance in Harris County and the contrasting pattern of WN virus activity, when it arrived in 2002. Our data indicate that both SLE and WN viruses can coexist, despite their ecologic, antigenic, and genetic similarities, and that both viruses will probably persist in this geographic region.

UI MeSH Term Description Entries
D003465 Culex A genus of mosquitoes (CULICIDAE) commonly found in tropical regions. Species of this genus are vectors for ST. LOUIS ENCEPHALITIS as well as many other diseases of man and domestic and wild animals. Culices
D004283 Dog Diseases Diseases of the domestic dog (Canis familiaris). This term does not include diseases of wild dogs, WOLVES; FOXES; and other Canidae for which the heading CARNIVORA is used. Canine Diseases,Canine Disease,Disease, Canine,Disease, Dog,Diseases, Canine,Diseases, Dog,Dog Disease
D004285 Dogs The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065) Canis familiaris,Dog
D004665 Encephalitis Virus, St. Louis A species of FLAVIVIRUS, one of the Japanese encephalitis virus group (ENCEPHALITIS VIRUSES, JAPANESE), which is the etiologic agent of ST. LOUIS ENCEPHALITIS in the United States, the Caribbean, and Central and South America. Saint Louis Encephalitis Virus,Encephalitis Viruses, St. Louis,St. Louis Encephalitis Viruses,St. Louis encephalitis virus,Virus, St. Louis Encephalitis,Viruses, St. Louis Encephalitis
D004674 Encephalitis, St. Louis A viral encephalitis caused by the St. Louis encephalitis virus (ENCEPHALITIS VIRUS, ST. LOUIS), a FLAVIVIRUS. It is transmitted to humans and other vertebrates primarily by mosquitoes of the genus CULEX. The primary animal vectors are wild birds and the disorder is endemic to the midwestern and southeastern United States. Infections may be limited to an influenza-like illness or present as an ASEPTIC MENINGITIS or ENCEPHALITIS. Clinical manifestations of the encephalitic presentation may include SEIZURES, lethargy, MYOCLONUS, focal neurologic signs, COMA, and DEATH. (From Adams et al., Principles of Neurology, 6th ed, p750) Lethargic Encephalitis, Type C,Meningoencephalitis, St. Louis,Saint Louis Encephalitis,St. Louis Viral Encephalitis,Encephalitis, Saint Louis,Encephalitis, Viral, St. Louis,St. Louis Encephalitis,St. Louis Meningoencephalitis,Type C Lethargic Encephalitis,Louis Meningoencephalitides, St.,Meningoencephalitides, St. Louis,St. Louis Meningoencephalitides
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
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
D000835 Animals, Wild Animals considered to be wild or feral or not adapted for domestic use. It does not include wild animals in zoos for which ANIMALS, ZOO is available. Animals, Nondomestic,Animals, Nondomesticated,Animals, Feral,Stray Animals,Animal, Feral,Animal, Nondomestic,Animal, Nondomesticated,Animal, Stray,Animal, Wild,Animals, Stray,Feral Animal,Feral Animals,Nondomestic Animal,Nondomestic Animals,Nondomesticated Animal,Nondomesticated Animals,Stray Animal,Wild Animal,Wild Animals
D000914 Antibodies, Viral Immunoglobulins produced in response to VIRAL ANTIGENS. Viral Antibodies
D001715 Bird Diseases Diseases of birds not considered poultry, therefore usually found in zoos, parks, and the wild. The concept is differentiated from POULTRY DISEASES which is for birds raised as a source of meat or eggs for human consumption, and usually found in barnyards, hatcheries, etc. Avian Diseases,Avian Disease,Bird Disease,Disease, Avian,Disease, Bird,Diseases, Avian,Diseases, Bird

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