Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0017160 (gastroenteritis)
 11,398 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

It is not known whether the presence of Herpes simplex virus in the throat of elderly patients with severe gastroenteritis and pulmonary implications is of clinical relevance. We cultured throat swabs and faeces of elderly patients with (n = 11) and without (n = 12) severe Salmonella gastroenteritis for viruses and bacteria to study the aetiology of respiratory complications. Complement fixation titers for anti-Herpes simplex antibodies in paired sera were also ascertained. Throat swabs of 6 out of 11 elderly patients with severe Salmonella enteritidis gastroenteritis were positive for Herpes simplex virus type 1. However, a four-fold increase of anti-Herpes simplex antibody titers in paired sera could not be demonstrated. None of the 12 throat swabs of elderly patients without gastro enteritis grew Herpes simplex virus. No other pathogens causing pulmonary complications could be demonstrated in throat swabs of the elderly patients. Herpes simplex virus present in the throat of the elderly patients was very probably not the agent responsible for the pulmonary complications and consequently treatment with acyclovir was not indicated. Weakness caused by severe gastroenteritis and the relative T-lymphocyte immunodeficiency state in the elderly probably enhanced the shedding of Herpes simplex virus in the throat of the elderly patients, without clinical relevance.
 ...
PMID:Clinical relevance of herpes simplex virus in the throat of elderly with Salmonella enteritidis gastroenteritis. 134 52

Several reports have described an inverse relationship between the frequency of infections and various malignancies. In this paper results of a hospital-based case control study on 139 melanoma patients and 271 suitable selected controls are presented, addressing the question of whether this relationship exists with respect to malignant melanoma while simultaneously controlling for the effects of other risk factors. Data on childhood diseases (group I), febrile diseases of adulthood (group II) and common febrile infections within a 5-year period prior to the diagnosis of melanoma (group III) were collected using a standardized interview. Group I diseases did not show a marked influence on the risk of malignant melanoma. Considering group II diseases, a significant protective effect was determined for chronic infectious diseases (OR = 0.32) and also for wound infections, abscesses and furunculosis (OR = 0.21). In group III, herpes simplex infections (OR = 0.45) and influenza/common cold (OR = 0.32) substantially reduced the melanoma risk. This effect was less pronounced for gastroenteritis (OR = 0.52). Analysis of the cumulative influence of infections pointed to a strong dose-response relationship between the frequency of febrile infections in adulthood and malignant melanoma. In particular, the risk reduction was striking when two or more febrile infections were compared to no febrile infections in group II (OR = 0.09) and group III (OR = 0.20). The study confirms the hypothesis that an inverse relationship exists between febrile infections and malignant melanoma, but these results have to be interpreted cautiously due to the inherent limitations of the case-control design.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Febrile infections and malignant melanoma: results of a case-control study. 145 Jun 74

The cross-reaction of HHV6 antibody with that to the other herpesviruses was studied in 96 blood donors whose sera were tested for IgG antibody to human herpesvirus type 6 (HHV6), cytomegalovirus (CMV), Epstein-Barr virus (EBV), varicella zostervirus (VZV) and herpes simplex virus (HSV). No correlation was found between IgG antibody to HHV6 and that to any of the other herpesviruses in these individuals. Antibodies to HHV6 and CMV were measured in patients undergoing documented serological responses to HHV6. Eleven cases of primary HHV6 infection associated with roseola infantum in babies, 1 of whom suffered from gastroenteritis as well as pyrexia and rash, are reported. Three cases of HHV6 reactivation, 1 in a 3-year-old child and 2 in adults, 1 of whom simultaneously underwent a primary CMV infection are also reported. Our results suggest that indirect immunofluorescence is a specific way of measuring HHV6 antibody, that HHV6 IgG and IgM can be detected in the absence of antibody to CMV and that HHV6 IgM is present both in primary HHV6 infections and in reactivations.
 ...
PMID:Production of IgM antibody to HHV6 in reactivation and primary infection. 215 5

After allogeneic bone marrow transplantation certain patterns of infectious complications emerge that follow the clinical course, are correlated to the immunobiology of transplantation and are almost predictable in their character and expression. The preparative regimen, designed to generate complete aplasia, will be associated with severe and sometimes life-threatening bacterial infections, predominantly with Gram-negative organisms derived from bowel flora, but also Gram-positive skin saprophytes. In this early aplastic phase, life-threatening viral infections are less common, consisting mainly of herpes simplex and possibly Epstein-Barr stomatitis and BK papovavirus cystitis. Systemic infections with invasive filamentous fungi are rare and are seen only when the induced aplasia is markedly prolonged. Once early marrow recovery has been achieved, systemic infections will generally disappear unless acute graft-vs.-host disease develops. This complication, which will lead to the breakdown of natural barriers such as skin and gastrointestinal epithelium and the marked impairment of all systemic defense mechanisms, can cause polymicrobial infections as well as set the stage for life-threatening viral infections. Such opportunistic viral infections, leading to either interstitial pneumonia or hemorrhagic gastroenteritis, are the major threat in the early recovery phase after engraftment has taken place. Usually caused by cytomegalovirus and rotavirus, respectively, these infections are the primary expression of the severe combined immunodeficiency post transplant, statistically associated with the presence of acute graft-vs.-host disease and amenable to immunologic manipulations. With the recovery of cellular and humoral immune function derived from transplanted donor lymphoid cells, the third phase of infectious complications is reached, covering 3 months to 2 years post grafting.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Infections and immunodeficiency in bone marrow transplantation. 304 57

Recombinant DNA technology appears to be on the verge of producing safe and effective protein vaccines for animal and human diseases. The procedure is applicable to most viruses because their isolated surface proteins generally possess immunogenic activity. Strategies used for the preparation and cloning of the appropriate genes depend on the characteristics of the viral genomes: whether DNA or RNA; their size, strandedness, and segmentation; and whether messenger RNA are monocistronic or polycistronic. Cloned surface proteins of foot-and-mouth disease and hepatitis B viruses are being tested for possible use as practical vaccines. Two doses of the cloned foot-and-mouth disease viral protein have elicited large amounts of neutralizing antibody and have protected cattle and swine against challenge exposure with the virus. Surface proteins have also been cloned for the viruses of fowl plague, influenza, vesicular stomatitis, rabies, and herpes simplex. Cloning is in progress for surface proteins of viruses causing canine parvovirus gastroenteritis, human papillomas, infectious bovine rhinotracheitis, Rift Valley fever, and paramyxovirus diseases. In addition, advances in recombinant DNA and other facilitating technologies have rekindled interest in the chemical synthesis of polypeptide vaccines for viral diseases. The bioengineering of bacterial vaccines is also under way. Proteinaceous pili of enterotoxigenic Escherichia coli are being produced in E coli K-12 strains for use as vaccines against neonatal diarrheal diseases of livestock.
 ...
PMID:Recombinant DNA technology for the preparation of subunit vaccines. 612 35

Molecular mimicry has been characterized as the presence of common epitopes, either linear or conformational, shared by host and microbial determinants. Such cross-reactivity may lead to an autoimmune disease. On the other hand molecular mimicry between certain viral proteins and host determinant may protect invading virus to be eliminated by immune system and may promote persistence. In this mini-review I discuss the molecular mimicry of S peplomer protein of mouse hepatitis virus, strain JHM (MHV-JHM) to the host Fc gamma receptor (Fc gamma R). MHV-JHM induces in rodents acute encephalomyelitis and surviving animals develop demyelinating disease with concomitant persistent infection. We have demonstrated that rabbit IgG, but not is F(ab')2 fragments, monoclonal rat and mouse IgG and the rat 2.4G2 anti-Fc gamma R mab immunoprecipitated natural and recombinant S peplomer protein of several strains of MHV. Furthermore, MHV-JHM infected cells formed rosettes with anti-sheep red blood cell (SRBC) - antibody coated SRBC. The 2.4G2 anti-Fc gamma R mab are able to neutralize several strains of MHV, presumably by binding to S peplomer protein. Therefore, the Fc binding site of S is present on the surface of MHV-infected cells. This molecular mimicry between S peplomer protein of MHV-JHM and Fc gamma R has been extended to other members of Coronaviridae, namely bovine coronavirus and transmissible gastroenteritis virus but not to infectious bronchitis virus. The molecular mimicry of viral antigens to Fc receptors has been described also for members of Herpesviridae, namely Herpes simplex, cytomegalovirus and Varicella zoster.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:Molecular mimicry between Fc receptors and viral antigens. 750 51

We studied the expression of interferon alpha (IFN alpha)-mRNA in porcine non-adherent peripheral blood mononuclear cells (PBMC) after induction by the coronavirus transmissible gastroenteritis virus (TGEV). We found that protein synthesis inhibition by cycloheximide (CHX) blocked IFN alpha-mRNA expression, except when PBMC were preincubated with a conditioned medium as a potential source of cytokines. These data indicate that IFN alpha-mRNA induction by TGEV requires de novo synthesis of proteins. Moreover, they suggest that IFN alpha-mRNA induction in porcine leukocytes by TGEV involves mechanisms identical to those described for the herpes simplex virus in humans. In addition, experiments performed with a TGEV mutant, dm 49-4, previously characterized for its low ability to induce IFN alpha, showed that addition of a conditioned medium could not normalize its IFN alpha-inducing ability. Therefore, the defect of the dm49-4 mutant may be at the level of the final triggering signal to PBMC.
 ...
PMID:Coronavirus transmissible gastroenteritis virus-mediated induction of IFN alpha-mRNA in porcine leukocytes requires prior synthesis of soluble proteins. 814 54

Numerous viruses found in the gut are not associated with primary infection or disease of the gastrointestinal tract. Other groups or viruses are not classically associated with infection of the gut but can infect the gastrointestinal tract in immunocompromised individuals (herpes simplex virus, cytomegalovirus, papillomavirus ....). The viruses associated with gastroenteritis represent a large number of taxonomic group. Because these viruses have in general been difficult to cultivate, most members of this group were firstly detected by electron microscopic examination (adenovirus, astrovirus, calicivirus, coronavirus, rotavirus ....). The most widely used diagnostic techniques for adenovirus (40/41), rotavirus and astrovirus detection in faecal samples include immunoassays such as Elisa and latex agglutination. Nucleic acid hybridization techniques have generally not proven to be substantially sensitive and the more sensitive techniques recently developed use the polymerase chain reaction (adenovirus) or the reverse transcription/polymerase chain reaction (astrovirus, calicivirus, coronavirus, rotavirus). Special efforts have been made in the search for efficient procedures to extract viral nucleic acids, and to establish the optimal conditions for the amplification and identification of PCR products but the candidate viruses were very different, consensus procedures were not determined, and amplification kits were not actually commercialized.
 ...
PMID:[Virus and gastrointestinal infections]. 930 26

The strong immunogenicity of bacterial fimbriae results from their polymeric and proteinaceous nature, and the protective role of these immunogens in experimental or commercial vaccines is associated with their capacity to induce antiadhesive antibodies. Fimbria-mediated intestinal colonization by enteropathogens typically leads to similar antibody responses. The possibility of taking advantage of these properties was investigated by determining whether enteroadhesive fimbriae, like the 987P fimbriae of enterotoxigenic Escherichia coli, can serve as carriers for foreign antigens without losing their adhesive characteristics. Random linker insertion mutagenesis of the fasA gene encoding the major 987P subunit identified five different mutants expressing wild-type levels of fimbriation. The linker insertion sites of these mutants were used to introduce three continuous segments of viral surface glycoproteins known to be accessible to antibodies. These segments encode residues 11 to 19 or 272 to 279 of herpes simplex virus type 1 (HSV-1) glycoprotein D [gD(11-19) and gD(272-279), respectively] or residues 379 to 388 of the transmissible gastroenteritis virus (TGEV) spike protein [S(379-388)]. Studies of bacteria expressing fimbriae incorporating mutated FasA subunits alone or together with wild-type FasA subunits (hybrid fimbriae) indicated that foreign epitopes were best exported and displayed on assembled fimbriae when they were inserted near the amino terminus of FasA. Fimbriated bacteria expressing FasA subunits carrying the HSV gD(11-19) or the TGEV S(379-388) epitope inserted between the second and third residues of mature FasA elicited high levels of foreign epitope antibodies in all rabbits immunized parenterally. Antibodies against the HSV epitope were also shown to recognize the epitope in the context of the whole gD protein. Because the 987P adhesive subunit FasG was shown to be present on mutated fimbriae and to mediate bacterial attachment to porcine intestinal receptors, polymeric display of foreign epitopes on 987P offers new opportunities to test the potential beneficial effect of enteroadhesion for mucosal immunization and protection against various enteric pathogens.
 ...
PMID:Polymeric display of immunogenic epitopes from herpes simplex virus and transmissible gastroenteritis virus surface proteins on an enteroadherent fimbria. 987 60

Acute gastroenteritis is common in adults. It can occur in institutional epidemics or epidemics of food-borne illness; in these cases, caliciviruses are the major cause of the condition. When acute gastroenteritis occurs in nonepidemic form, its causes are less clear. It may be due to caliciviruses or to the less common serotypes of childhood gastroenteritis viruses, such as rotavirus, astrovirus, and adenovirus. The pathogenesis of acute viral gastroenteritis is not completely understood. Old evidence suggests that mild villus damage is responsible, but new evidence indicates that active secretion and motility disturbance may be involved in the production of symptoms. Five common viruses can remain latent in gastrointestinal tissues and produce disease many years after initial infection. Two major herpesviruses, cytomegalovirus and herpes simplex virus, cause ulcerative disease of the gastrointestinal tract. This disease occurs in healthy persons but is more common and more severe in immunocompromised patients. Three other viruses--Epstein-Barr virus, human papilloma virus, and human herpesvirus-8--are implicated in benign and malignant proliferative diseases of the gastrointestinal tract. Epstein-Barr virus has been associated with immunoproliferative disease after transplantation and may also cause small-bowel and colonic lymphoma in healthy adults. It causes most AIDS-related lymphomas. Human papillomaviruses cause anorectal condyloma and anal cancer. Human herpesvirus-8 causes gastrointestinal Kaposi sarcoma.
 ...
PMID:Viral infections of the gastrointestinal tract. 1098 Sep 63


1 2 Next >>