Biomaterial Database

Serodiagnosis of La Crosse virus infections in humans. 1981

C H Calisher, and R E Bailey

Serological diagnoses of human infections with California serogroup viruses are usually made by means of complement fixation or hemagglutination inhibition tests or both. An analysis of antibody titers in sera from 128 humans with California (La Crosse) virus infections indicated that exclusive use of the complement fixation tests would have detected only 50% of the actual seroconversions, whereas hemagglutination inhibition and neutralization tests alone would have been sufficient to make the diagnosis in 79.3% and 84.8% of the cases, respectively. These and other results presented demonstrate that the complement fixation test is not sufficiently useful as a primary tool for diagnosis of La Crosse virus infections. We suggest the use of the hemagglutination inhibition test for preliminary screening of sera from individuals with suspect infections caused by California serogroup viruses. The neutralization test should then be used or confirmation and subtype identification. If hemagglutination inhibition and neutralization titers are high and stable, the complement fixation test should then be used as a last, but specific, resort.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D009500	Neutralization Tests	The measurement of infection-blocking titer of ANTISERA by testing a series of dilutions for a given virus-antiserum interaction end-point, which is generally the dilution at which tissue cultures inoculated with the serum-virus mixtures demonstrate cytopathology (CPE) or the dilution at which 50% of test animals injected with serum-virus mixtures show infectivity (ID50) or die (LD50).	Neutralization Test,Test, Neutralization,Tests, Neutralization
D002043	Bunyaviridae	A family of viruses, mainly arboviruses, consisting of a single strand of RNA. Virions are enveloped particles 90-120 nm diameter. The complete family contains over 300 members arranged in five genera: ORTHOBUNYAVIRUS; HANTAVIRUS; NAIROVIRUS; PHLEBOVIRUS; and TOSPOVIRUS.
D002141	Encephalitis Virus, California	A species in the ORTHOBUNYAVIRUS genus of the family BUNYAVIRIDAE. Serotypes are found in temperate and arctic regions and each is closely associated with a single species of vector mosquito. The vertebrate hosts are usually small mammals but several serotypes infect humans.	Jamestown Canyon virus,Tahyna virus,California Encephalitis Virus,California Encephalitis Viruses,California Group Viruses,California Virus,Encephalitis Viruses, California,La Crosse Encephalitis Virus
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D003168	Complement Fixation Tests	Serologic tests based on inactivation of complement by the antigen-antibody complex (stage 1). Binding of free complement can be visualized by addition of a second antigen-antibody system such as red cells and appropriate red cell antibody (hemolysin) requiring complement for its completion (stage 2). Failure of the red cells to lyse indicates that a specific antigen-antibody reaction has taken place in stage 1. If red cells lyse, free complement is present indicating no antigen-antibody reaction occurred in stage 1.	Complement Absorption Test, Conglutinating,Conglutination Reaction,Conglutinating Complement Absorption Test,Complement Fixation Test,Conglutination Reactions,Fixation Test, Complement,Fixation Tests, Complement,Reaction, Conglutination,Reactions, Conglutination,Test, Complement Fixation,Tests, Complement Fixation
D004670	Encephalitis, California	A viral infection of the brain caused by serotypes of California encephalitis virus (ENCEPHALITIS VIRUS, CALIFORNIA) transmitted to humans by the mosquito AEDES triseriatus. The majority of cases are caused by the LA CROSSE VIRUS. This condition is endemic to the midwestern United States and primarily affects children between 5-10 years of age. Clinical manifestations include FEVER; VOMITING; HEADACHE; and abdominal pain followed by SEIZURES, altered mentation, and focal neurologic deficits. (From Joynt, Clinical Neurology, 1996, Ch26, p13)	California Viral Encephalitis,Jamestown Canyon Virus Disease,Jamestown Canyon Virus Encephalitis,Tahyna Virus Disease,Tahyna Virus Infection,California Encephalitis,California Encephalitis Virus Infection,Encephalitis, California, Viral,La Crosse Encephalitis,La Crosse Encephalitis Virus Infection,Viral Encephalitis, California,Disease, Tahyna Virus,Encephalitis, California Viral,Encephalitis, La Crosse,Infection, Tahyna Virus,Virus Disease, Tahyna,Virus Infection, Tahyna
D004671	Encephalitis, Arbovirus	Infections of the brain caused by arthropod-borne viruses (i.e., arboviruses) primarily from the families TOGAVIRIDAE; FLAVIVIRIDAE; BUNYAVIRIDAE; REOVIRIDAE; and RHABDOVIRIDAE. Life cycles of these viruses are characterized by ZOONOSES, with birds and lower mammals serving as intermediate hosts. The virus is transmitted to humans by the bite of mosquitoes (CULICIDAE) or TICKS. Clinical manifestations include fever, headache, alterations of mentation, focal neurologic deficits, and COMA. (From Clin Microbiol Rev 1994 Jan;7(1):89-116; Walton, Brain's Diseases of the Nervous System, 10th ed, p321)	Arthropod-Borne Encephalitis,Australian Encephalitis,Encephalitis, Epidemic,Mosquito-Borne Encephalitis,Murray Valley Encephalitis,Arboviral Encephalitis,Arthropod-Borne Viral Encephalitis,Encephalitis, Arthropod-Borne,Encephalitis, Mosquito-Borne,Epidemic Encephalitis,Viral Encephalitis, Arthropod-Borne,Arboviral Encephalitides,Arbovirus Encephalitides,Arbovirus Encephalitis,Arthropod Borne Encephalitis,Arthropod Borne Viral Encephalitis,Arthropod-Borne Encephalitides,Arthropod-Borne Viral Encephalitides,Encephalitis, Arboviral,Encephalitis, Arthropod Borne,Encephalitis, Arthropod-Borne Viral,Encephalitis, Australian,Encephalitis, Mosquito Borne,Encephalitis, Murray Valley,Epidemic Encephalitides,Mosquito Borne Encephalitis,Mosquito-Borne Encephalitides,Valley Encephalitis, Murray,Viral Encephalitis, Arthropod Borne
D005260	Female		Females
D006385	Hemagglutination Inhibition Tests	Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination.	Hemagglutination Inhibition Test,Inhibition Test, Hemagglutination,Inhibition Tests, Hemagglutination,Test, Hemagglutination Inhibition,Tests, Hemagglutination Inhibition