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At least 109 records · Page 6Linked to original sources
PubMed1987

Molecular pathogenesis of equine coital exanthema (ECE): temperature sensitivity (TS) and restriction endonuclease (RE) fragment profiles of several field isolates.

Examination of six field isolates of equine herpesvirus 3, the causative agent of equine coital exanthema, indicates that all were temperature sensitive (ts) at the body temperature, 39 degrees C, of their host (Equine asinus and callabus) when grown in cell culture. The isolates were characterized by fingerprint analysis with the restriction endonucleases XbaI, EcoRI, BamHI and Hind III to establish possible epidemiologic relatedness. Three of the six isolates may be considered related. Variation in the mobility of the BamHI-A and Hind III-K fragments indicates that a small plaque isolate may contain a 5.7 kb insert of DNA in the unique short region of the genome.

Animals↗
PubMed1986

Molecular pathogenesis of equine coital exanthema: temperature-sensitive function(s) in cells infected with equine herpesviruses.

Preliminary experiments have revealed that several laboratory and wild-type strains of the equine herpesvirus (EHV) triad were temperature-sensitive for growth when assayed at 39 degrees C. The efficiencies of plating (EOP) observed were 10(-2) for both EHV 1 and 2, and 1 X 10(-6) for EHV 3. The EOPs were determined by plaque assays which compared titrations at 34 degrees C and 39 degrees C on equine fetal dermal fibroblast cells. Growth yield experiments, assayed at 34 degrees C, reflected those EOP's, but did not indicate any difference in yields when infected cultures were incubated at 34 degrees C and 37 degrees C. Temperature shift experiments with EHV 3-infected cultures revealed that a temperature-sensitive function(s) responsible for the reduction in titer appeared to be a late function(s). All strains examined appeared to incorporate H3-thymidine into viral-density DNA at the non-permissive temperature of 39 degrees C. Electron microscopy of EHV 3-infected cell cultures, incubated continuously at the non-permissive temperature and examined at 18 h after infection, revealed structures consistent with the accumulation of nucleocapsids within the nucleus. The evidence presented is consistent with the hypothesis that in equine dermal cells infected with a plaque-purified wild-type strain of EHV 3 (1118LP), a function needed for the egress of nucleocapsids from the nucleus is absent at 39 degrees C. The significance of these findings relative to the pathogenicity of the disease (equine coital exanthema) caused by this virus is discussed.

Animals↗
PubMed2002

Allergic cholestatic hepatitis and exanthema induced by metamizole: verification by lymphocyte transformation test.

We report about a 66-year-old-male patient who was hospitalized with generalized exanthema and increase of liver enzymes after intake of metamizole because of flue-like symptoms. Despite initial high dose steroids, disease activity persisted, and therefore liver biopsy was performed. Histology revealed acute hepatitis with perivenular non-bridging confluent necrosis and granuloma formation consistent with drug-induced hepatitis. A metamizole-induced process was suspected. Lymphocyte transformation test confirmed the sensitization of the patient's lymphocytes to metamizole and three of its four metabolites (4-methylaminoantipyrine, 4-acetylaminoantipyrine and 4-formylaminoantipyrine). Other drugs could be excluded with high probability. In the follow-up, the general condition of the patient improved, and liver enzymes decreased under treatment with steroids. Thus, we conclude that in this patient metamizole has induced an allergic reaction not only of the skin but also of the liver. To our knowledge, an allergic cholestatic hepatitis caused by metamizole has been reported only once in literature.

Aged↗
PubMed2001

Identification of equine herpesvirus 3 (equine coital exanthema virus), equine gammaherpesviruses 2 and 5, equine adenoviruses 1 and 2, equine arteritis virus and equine rhinitis A virus by polymerase chain reaction.

OBJECTIVE: To develop rapid (< 8 hour) tests using polymerase chain reaction (PCR) for the diagnosis of equine herpesvirus 3 (EHV3; equine coital exanthema virus), equine gammaherpesviruses 2 (EHV2) and EHV5, equine adenovirus 1 (EAdV1), EAdV2, equine arteritis virus (EAV), equine rhinitis A virus (ERAV; formerly equine rhinovirus 1) DESIGN: Either single round or second round (seminested) PCRs were developed and validated. METHODS: Oligonucleotide primers were designed that were specific for each virus, PCR conditions were defined and the specificity and sensitivity of the assays were determined. The application of the tests was validated using a number of independent virus isolates for most of the viruses studied. The PCRs were applied directly to clinical samples where samples were available. RESULTS: We developed a single round PCR for the diagnosis of EHV3, a seminested PCR for EHV2 and single round PCRs for EHV5, EAdV1, EAdV2 and RT-PCRs for EAV and ERAV. The PCR primer sets for each virus were designed and shown to be highly specific (did not amplify any recognised non-target template) and sensitive (detection of minimal amounts of virus) and, where multiple virus isolates were available all isolates were detected. CONCLUSION: The development and validation of a comprehensive panel of PCR diagnostic tests, predominantly for viruses causing equine respiratory disease, that can be completed within 8 hours from receipt of clinical samples, provides a major advance in the rapid diagnosis or exclusion diagnosis of these endemic equine virus diseases in Australia.

Adenoviridae↗
PubMed1976

[Etiology and morbidity of drug exanthemas from a clinical viewpoint].

After a brief discussion of the potential errors and uncertainies of statistics about etiology and epidemiology of drug eruptions the 144 cases, seen from 1968 to 1974 in our dermatological clinic, are analysed and compared with the data from the years 1957 to 1965 respectively the quantities of special drugs, consumed during one year in Dresden city. The results are: significant increase of drugs eruptions (from 0,9% in 1957 to 1965 to 1,9% in 1968 to 1974) among the hospitalised patients; absolute and relative increase of penicillin- (36,7%) and chloramphenicolreactions (21,6%) combined with a decreasing importance of sulfonamides and barbiturates among the causes of drug rashes; increase of urticarial - and decrease of fixed exanthemas: a yearly frequency of 3 to 4 clinically treated ore diagnosticated drug eruptions/100 000 inhabitants respectively 1 to 2 chloramphenicol and 1--5 penicillin-rashes/10 000 treatments. Even if only 10% of the drug eruptions are diagnosticated by us and 90% in other clinics or ambulances the frequency of penicillin-rashes merely amounts to 1 to 5%.

Barbiturates↗
PubMed1976

[The value of the thrombocytopenia test in the specific diagnosis of drug allergy, especially drug-exanthema].

125 thrombocytopenia tests (so-called thrombocytopenic index) from 94 patients with suspected drug allergies and negative skin tests were critically examined to determine the value of this in vivo method in the clarification of drug allergy. A consistent decrease of 20% or more in thrombocytes was rated as significant and therefore indicative of drug sensitization. 78.4% of the tests were in agreement with the expected result. Clinically relevant drug sensitivity was apparent in 30.4% of the tests, while the possibility of allergy could be eliminated in 48%. 16.8% of the results were inconclusive and 4.8% were false negatives. A flare-up occurred after 5.6% of the tests. A leukocyte count was considered unnecessary since it proved to be unrelated to a drop in thrombocytes and the existence of drug allergy. The thrombocyte test is a practical and valuable method for investigation of drug allergies, especially as the available in vitro tests are too complex to be used routinely in a diagnostic test program. However, the results must be considered critically in conjunction with an accurate case history, the clinical symptoms and the course of the disease. In the case of blisters and erythema exsudativum multiforme-like drug exanthema, renewed exposure to the suspected drug must be avoided due to the possible danger of a drug reaction. The latest research results have helped to clarify the underlying mechanism of the thrombocyte decrease.

Aspirin↗
PubMed1977

[Complement pattern in children with allergic-toxic exanthema--a contribution to differential diagnosis (author's transl)].

25 Sera from children with the clinical diagnosis: urticaria, allergic-toxic exanthema were examined for the complement components C3, C4 and C3-Activator. We applied the radial immunodiddusion. As controls served 50 helathy children and 25 children with morbili, rubeolae and scarlet fever. C3 was found to be decreased in 23 cases, C4 in 4 and C3-Activator in 19 cases of urticaria. This indicates the possiblity for the differential diagnosis, but children of the control groups did not show any consumption of one of the described complement components.

Child↗
PubMedDate not supplied

[Comparison of serological procedures used for the diagnosis of viral exanthema in laboratories participating in the measles elimination plan].

OBJECTIVE: The comparison of serological methods used by the laboratories participating in the Network for the Elimination of Measles to diagnose measles virus infection as well as differential diagnosis with other exanthematic diseases are compared. MATERIALS AND METHODS: One panel of 20 serum samples including measles (12), rubella (4), parvovirus B19 (2) and dengue (2) infections was established. All cases were diagnosed by detection of specific IgM. The panel was sent to the laboratories of the Network. The results were compared with those obtained at the reference laboratory. RESULTS AND DISCUSSION: Regarding measles, IgM response from 20 laboratories (19 by ELISA and 1 by indirect immunofluorescence) was obtained, with an agreement of 91.5%. Related to rubella IgM, replay from 6 laboratories, using ELISA, was received, with an agreement of 98.7%. With respect to parvovirus B19 IgM, response from 10 laboratories (8 by ELISA and 2 by indirect immunofluorescence) was obtained, with an agreement of 94.6%. Results about dengue virus were not reported by any laboratory. CONCLUSION: Some laboratories from the network should review the methods used for the diagnosis of measles and other exanthematic diseases. The results reassert the need for a reference laboratory to support confirmation of the results.

Antibodies, Viral↗