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Query: UMLS:C0017160 (gastroenteritis)
 11,398 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Monoclonal antibody specific for subgroup F enteric adenoviruses (EAds) was prepared by fusing P3-NS1/Ag4-1 mouse myeloma cells with lymphocytes from BALB/c mice immunized with G1105, an adenovirus type 41 (Ad41) strain. Monoclone 3F11/2H9, which specifically recognized Ad41, was successfully used as detector antibody in an enzyme-linked immunosorbent assay (ELISA). Additionally, previously prepared monoclones 5D8/2C2 and 2H6/1E11, recognizing Ad40 plus Ad41 and Ad40 alone, respectively, were used to study stool and/or tissue culture specimens from 106 patients with adenovirus-positive gastroenteritis. By ELISA, 91 had EAds (22 were Ad40 and 69 were Ad41) and 15 had non-EAds. ELISA results were in concordance with restriction endonuclease results for 38 of 39 specimens, with dot blot data for 19 of 20 specimens, and with neutralization test results for 74 of 78 specimens. ELISA was at least 10-fold more sensitive than direct electron microscopy was for the detection of EAds in stool specimens.
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PMID:Monoclonal antibody enzyme-linked immunosorbent assay for specific identification and typing of subgroup F adenoviruses. 334 24

Fastidious adenovirus DNA in faecal samples obtained from children with acute gastroenteritis was extracted by a simple and rapid method. The extracted viral DNA was characterized by restriction endonuclease SmaI treatment. Fastidious adenovirus DNA was detected in 58 of 65 cases. If faecal samples were too small it was not always possible to identify virus DNA.
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PMID:A simple and rapid method for typing adenoviruses 40 and 41 without cultivation. 397 42

We have studied the DNAs of fastidious enteric adenoviruses recovered from the stools of infants with gastroenteritis. By endonuclease analysis, the strains examined represent candidate adenovirus types 40 and 41, which are thought to comprise new adenovirus subgroups F and G. Cloning of DNA from representative enteric adenovirus isolates, together with hybridization and subcleavage analysis, permitted the mapping of restriction enzyme cleavage sites. Although the restriction profiles are different for the two strains, they appear to have several cleavage sites in common. Cross hybridization studies show considerable homology between the subgroup F and G strains but much less homology to adenovirus 2. In addition, regions on both ends of enteric adenovirus genomes (map units, 2.9 to 11.3 and 75 to 100) possess little or no homology to adenovirus 2. Restriction enzyme digests reveal submolar fragments that map to the terminal regions of the genome. Electron micrographic studies of denatured and renatured DNA strands suggest that the submolar fragments may derive from cleavage of defective molecules. Inverted terminal repeat sequences were shown to comprise 0 to 3.2% of the length of complete (greater than or equal to 22 megadaltons) enteric adenovirus DNA molecules but 4 to 69% of incomplete-length (less than 22-megadalton) molecules.
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PMID:Cloning and physical mapping of enteric adenoviruses (candidate types 40 and 41). 632 32

Thirty-five stool specimens, collected over a 14-week period from pediatric gastroenteritis patients and shown to contain adenovirus by electron microscopy, were inoculated onto 293 and HeLa cells. Virus isolates were characterized by serum neutralization and restriction endonuclease cleavage analysis of viral DNA from infected cells. Adenovirus was isolated upon primary inoculation of 293 cells from all 35 specimens shown to contain adenovirus by electron microscopy. Fastidious adenoviruses 40 and 41 (Ad40 and Ad41) were found in 17 (49%) of the stool specimens, and 4 of these specimens contained a conventional species (Ad1, Ad1, Ad18, Ad31) as well as Ad40. This was first manifest by the observation that four of the isolates which initially grew only in 293 cells acquired the capacity to grow in HeLa cells upon subsequent passage. In each case, the conventional species was undetectable by DNA analysis in the original inoculum but was selected in 293 cells and became the only one detectable by the second passage. Four other specimens, containing Ad1 or Ad31 alone, failed to grow initially in HeLa cells but did grow in 293 cells. The results of this study demonstrate therefore that (i) 293 cells are more sensitive than HeLa cells for the isolation of conventional as well as fastidious enteric adenovirus species and (ii) identification of viruses from patient specimens should involve minimal passage of the virus in cell culture, as a single passage can result in misdiagnosis of the virus associated with the infection.
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PMID:Diagnosis of fastidious enteric adenoviruses 40 and 41 in stool specimens. 649 Aug 23

Yersinia enterocolitica gastroenteritis was first recognized in the early 1960s and has since been reported with increasing frequency. To determine if strains of Y. enterocolitica, within a restricted region isolated over 8 years (1985-1993), originated from a single or multiple clones, pulsed-field gel electrophoresis (PFGE) of large chromosomal DNA restriction fragments generated by XbaI or NotI was used. A total of 27 isolates of Y. enterocolitica were analyzed, 24 from Austria (Vienna and Graz) consisting of serogroups 0:3 (17 isolates), 0:9 (6 isolates), 0:5 (1 isolate); 2 from Germany of serogroups 0:3 and 0:9 (1 isolate each); 1 from the U.S.A. of serogroup 0:8. Genomic fingerprints of these strains were compared to those of 8 other Yersinia species to ascertain if their restriction endonuclease digestion profiles (REDP) were serogroup and/or species specific. The 27 Y. enterocolitica strains could be divided into 16 genomic varieties according to their restriction patterns with NotI and XbaI. PFGE was highly discriminatory as strains belonging to the same serogroup could be subdivided into different genomic groups. Furthermore, Y. enterocolitica strains isolated from the same region, over an 8 year period, belonged to a few closely related clones. The genomic fingerprints of Yersinia were found to be species and serogroup specific.
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PMID:Clamped homogenous electric fields (CHEF) gel-electrophoresis of DNA restriction fragments for comparing genomic variations among strains of yersinia enterocolitica and Yersinia spp. 772 92

We report a 5 year prospective study of episodes of rotavirus, subgenus F adenovirus, and astrovirus gastroenteritis diagnosed by electron or immune electron microscopy in a single regional virology laboratory. Of 1426 total infections, the numbers in each category were 1117 (78.3%), 254 (17.8%), and 20 (7.9%), respectively. Using restriction endonuclease analysis or immune electron microscopy, all but 20 of the subgenus F adenovirus strains were classified as type 40 (n = 50) or type 41 (n = 184). Rotavirus and astrovirus infections were more prevalent in winter than summer, whereas subgenus F (either type 40 and 41) adenoviruses showed no seasonal variation in prevalence. The ratio of type 40 to all typable subgenus F adenoviruses declined between 1984 and 1986 and then increased again. Adenoviruses were relatively more important as causes of viral gastroenteritis in infants aged less than 6 months than in toddlers aged 12 months or more, but even in young infants more rotavirus than adenovirus infections were diagnosed. Our data confirmed the epidemiological differences between rotavirus, subgenus F adenovirus and rotavirus gastroenteritis and documented the shared epidemiological characteristics of type 40 or 41 adenovirus infections.
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PMID:Comparative epidemiology of rotavirus, subgenus F (types 40 and 41) adenovirus and astrovirus gastroenteritis in children. 838 4

An RT-PCR method was developed that amplified genetic material from the 5' end of the S protein gene of both transmissible gastroenteritis virus (TGEV) and porcine respiratory coronavirus (PRCV), but discriminated between the two by the size of the product generated. A number of restriction endonuclease enzymes were assessed for recognition of the amplicons so produced. The assay was shown to detect viral RNA from all of the 26 different TGEV and PRCV isolates examined, covering a period from 1946 to 1996. Detection of TGEV in clinical specimens was possible using a spin column method to extract RNA and sensitivity was compared to virus isolation and antigen detection ELISA. The method could provide a means of confirming positive results from immunological screening tests such as FAT and ELISA, reducing the need for virus isolation and convalescent serology.
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PMID:Detection of transmissible gastroenteritis virus by RT-PCR and differentiation from porcine respiratory coronavirus. 925 41

Phage typing (PT) combined with pulsed-field gel electrophoresis (PFGE) and a random amplified polymorphic DNA (RAPD) fingerprinting method was used to characterize Salmonella enteritidis strains. Twenty-four epidemiologically unrelated isolates, sampled from diverse ecological niches and fifteen isolates from four well-defined outbreaks of foodborne gastroenteritis, were studied. Seven phage types, with a predominance of PT 4 (63% of isolates), were observed when analysing the epidemiologically unrelated group. PT 4 was detected in all of the ecological niches studied, including food and fecally polluted river and beach water. The discriminatory power for phage typing, the average probability that the typing system will assign a different type to two unrelated strains randomly sampled in the microbial population, was 0.62. Ten PFGE pattern types were obtained with Xba I restriction endonuclease enzyme among the unrelated isolates; thirteen isolates belonged to PFGE pattern type 1 and the rest of the PFGE types were assigned to one or two isolates. The Dice coefficient clustered the similarities of the PFGE patterns between 80-100%. PFGE showed a discriminatory power of 0.72. Five clearly distinct RAPD patterns were observed with the OPS-19 oligonucleotide, but the discrimination obtained was low (0.46). The combination of the three typing methods increased the number of types to seventeen, giving high discrimination (0.92). Seven of the isolates recovered from various ecological niches belonged to the combination PT 4/PFGE 1/RAPD A and other combinations were unique or included only two strains. The four epidemiologically well-defined foodborne outbreaks were associated with the PT 4 phage type. In two of the outbreaks, other phage types (PT 7a and RDNC) were also observed in two isolates. Most of the isolates belonging to the foodborne outbreaks had an identical PFGE pattern (PFGE pattern type 1), but a difference in a restriction band was observed in an isolate belonging to an outbreak. Two RAPD patterns were observed in the outbreaks; RAPD pattern type A was detected in three of the four outbreaks. When the combined typing method was applied to the study, high concordance was observed and most of the outbreak strains belonged to the combination PT 4/PFGE 1/RAPD A. It is concluded that the combination of phage type with PFGE and RAPD provides a powerful discriminatory tool for the epidemiological analysis of unrelated and related strains of S. enteritidis.
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PMID:Phage typing combined with pulsed-field gel electrophoresis and random amplified polymorphic DNA increases discrimination in the epidemiological analysis of Salmonella enteritidis strains. 960 Jun 7

Two strains of canine rotavirus were isolated from pups with clinical signs of gastroenteritis. Both strains were identified by polymerase chain reaction (PCR) as G3P5A[3], although restriction endonuclease analysis of the PCR amplicons revealed a genetic difference between the two isolates in the VP7 gene. The isolation in Italy of canine rotaviruses displaying the same VP7 and VP4 specificities as in the USA and in Japan, suggests that the G3 and P5A[3] types are highly conserved among canine rotavirus strains.
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PMID:Isolation and genetic characterization of two G3P5A[3] canine rotavirus strains in Italy. 1151 88

Isolates of Salmonella enteritidis PT3, a rare phage type, were recovered from patients and strains were isolated from an outbreak of gastroenteritis that occurred during the summer of 1997 in North-East Sardinia, Italy. To investigate possible clonal involvement in the outbreak and to evaluate the capacity to discriminate among S. enteritidis PT3 strains, a number of molecular typing methods including ribotyping with a mixture of PstI and SphI (PS-ribotyping), PFGE with endonuclease XbaI and RAPD typing with four arbitrary primers was used. The typical XbaI endonuclease generated PFGE pattern also explained the prevalence of highly clonal S. enteritidis PT3 strains in the outbreak and adjacent areas. RAPD fingerprinting with primers OPA 4, OPB 15, OPB17 and P1254 exhibited a single but unique RAPD profile among the outbreak strains from various sources that differed significantly from control strains. The results of this study showed that when an appropriately chosen set of primers is employed, RAPD fingerprinting can be used as an alternative, rapid, highly reproducible technique for tracing the clonal relations of S. enteritidis PT3, and can be more discriminatory than PFGE. Furthermore, this study revealed the possibility of PT3 causing outbreak.
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PMID:Clonal relations among Salmonella enteritidis phage type 3 outbreak isolates traced by DNA fingerprinting. 1171 75


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