Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “virus classification”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 343 records · Page 19Linked to original sources
PubMed1995

Use of solid-phase immune electron microscopy for classification of Norwalk-like viruses into six antigenic groups from 10 outbreaks of gastroenteritis in the United States.

Norwalk-like viruses observed in fecal specimens from 10 outbreaks of gastroenteritis investigated in the United States between 1987 and 1992 were analyzed by solid-phase immune electron microscopy. Outbreak virus strains were classified into six antigenic groups: the four types (UK1 to UK4) previously defined in the United Kingdom, Norwalk virus, and the Oklahoma agent that was newly defined in this study. The diversity of antigenic types demonstrated in these outbreaks was greater than previously recognized and will serve as a basis for characterization of these strains at the molecular level.

Antibodies, Viral↗
PubMed1998

A novel P/V/C gene in a new member of the Paramyxoviridae family, which causes lethal infection in humans, horses, and other animals.

In 1994, a new member of the family Paramyxoviridae isolated from fatal cases of respiratory disease in horses and humans was shown to be distantly related to morbilliviruses and provisionally called equine morbillivirus (K. Murray et al., Science 268:94-97, 1995). To facilitate characterization and classification, the virus was purified, viral proteins were identified, and the P/V/C gene was cloned and sequenced. The coding strategy of the gene is similar to that of Sendai and measles viruses, members of the Paramyxovirus and Morbillivirus genera, respectively, in the subfamily Paramyxovirinae. The P/V/C gene contains four open reading frames, three of which, P, C, and V, have Paramyxovirinae counterparts. The P and C proteins are larger and smaller, respectively, than are cognate proteins in members of the subfamily, and the V protein is made as a result of a single G insertion during transcription. The P/V/C gene has two unique features. (i) A fourth open reading frame is located between those of the C and V proteins and potentially encodes a small basic protein similar to those found in some members of the Rhabdoviridae and Filoviridae families. (ii) There is also a long untranslated 3' sequence, a feature common in Filoviridae members. Sequence comparisons confirm that although the virus is a member of the Paramyxovirinae subfamily, it displays only low levels of homology with paramyxoviruses and morbilliviruses and negligible homologies with rubulaviruses.

Amino Acid Sequence↗
PubMed2002

[Classification of genotyping hepatitis B virus with multiplex PCR].

OBJECTIVE: To establish a simple and practicable method to identify the different genotypes of hepatitis B virus (HBV). METHODS: Based on the alignment of 114 complete nucleotide sequence for HBV DNA of different genotypes, the specific sequence of each genotype was found. Six primer sets were designed for each of the six genotypes according to the genotype-specific sequence, and used separately for PCR. The genotype of HBV was identified according to the positive result of PCR. Three primer sets for B, C and D genotypes were added into a single tube for PCR reaction, and HBV was genotyped according to the length of the amplified DNA. RESULTS: There was no difference in the genotyping result of PCR by single or multiplex primers, which was identical to the PCR-RFLP method. CONCLUSIONS: This multiplex PCR method is simple, precise, sensitive, and easy to use.

DNA Primers↗
PubMed2003

Medical devices; immunology and microbiology devices; classification of the West Nile Virus IgM capture Elisa assay. Final rule.

The Food and Drug Administration (FDA) is classifying the West Nile Virus IgM Capture Elisa assay into class II (special controls). The agency is taking this action in response to a petition submitted under the Federal Food, Drug, and Cosmetic Act (the act) as amended by the Medical Device Amendments of 1976 (the amendments), the Safe Medical Devices Act of 1990, and the Food and Drug Administration Modernization Act of 1997 (FDAMA). The agency is classifying this device into class II (special controls) in order to provide a reasonable assurance of safety and effectiveness of the device. Elsewhere in this issue of the Federal Register, FDA is announcing the availability of a guidance document that will serve as the special control for the device.

Device Approval↗
PubMed1990

[Dihydralazine hepatitis. Morphologic and clinical criteria for diagnosis].

70 cases of acute dihydralazine-associated hepatitis with centrolobular or confluent necroses, registered in the files of the Berlin-Friedrichshain Institute of Pathology, between 1981 and 1985, were classified into 3 types of diagnostic probability for differential diagnosis versus virus hepatitis. Classification was conducted according to recommendations given by a working group of pathologists, specialised in liver pathology. 42 cases out of this material had come from Prenzlauer-Berg Hospital, Department of Infectious Diseases, and were re-examined under clinical aspects. 6 of them were discarded from evaluation. Type I proved to be of high diagnostic reliability, as was seen from 61% of all cases. Only 3 cases had to be discarded from that group and were associated with other drugs, such as halothane, methyldopa, and propranolol. The following clinical parameters proved to be of particular value for definite assessment of drug-induced hepatitis: time of exposure (for analysis of co-medication), time of recovery, and re-exposure test. Only circumstantial evidence so far can be provided for all histological types to causative relationship between drug ingestion and hepatitis. Compliance with mandatory notification should be ensured in all cases, since suspicious cases are explicitly included. Higher sex-related disposition of women to drug-induced hepatitis was confirmed in our material, with the female-to-male ratio being 3:1.

Acute Disease↗
PubMed1989

HIV and the dental undergraduate.

Reasons are offered as to why it is imperative that the dental undergraduate is familiar with all aspects of AIDS. The epidemiology of the disease is discussed, as are methods of transmission of the virus. A classification is given of the clinical presentation of HIV infection. The classification is based on the system put forward by the Centers for Disease Control, Atlanta. A brief résumé is given of laboratory diagnosis in HIV infection, and of the risk of health care workers contracting the disease. The precautions recommended for use in dentistry as proposed by the Centers for Disease Control are quoted in full. Finally mention is made of the treatment and control of AIDS.

Acquired Immunodeficiency Syndrome↗