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Distribution of HHV-6 variants in human tissues. HHV-6变异在人体组织中的分布。
Infectious agents and disease Pub Date : 1996-10-01
D Di Luca, P Mirandola, T Ravaioli, B Bigoni, E Cassai
{"title":"Distribution of HHV-6 variants in human tissues.","authors":"D Di Luca,&nbsp;P Mirandola,&nbsp;T Ravaioli,&nbsp;B Bigoni,&nbsp;E Cassai","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Human herpesvirus (HHV)-6 strains segregate into two variants (HHV-6A and HHV-6B), closely related to each other but clearly and easily distinguishable. These two HHV-6 variants differ in their ability to grow in T-cell lines, have distinctive patterns of DNA restriction fragments, and show specific reactivities with some monoclonal antibodies. The degree of DNA homology between variants ranges from 97% in the most conserved region to 75% in the immediate early region 1. HHV-6B is the etiologic agent of exanthema subitum but HHV-6A has not yet been clearly associated with any human pathology. HHV-6 sequences are frequently detected by the polymerase chain reaction (PCR) in healthy and pathological tissues. HHV-6B is more prevalent in peripheral blood mononuclear cells and in lymphatic tissue. The prevalence of HHV-6A may be greater in some pathological conditions such as Kaposi's sarcoma, and in skin biopsies. Results so far available support the hypothesis that HHV-6 variants may have different epidemiologies.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"203-14"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lymphocytes from site of disease indicate probable microbiological etiology of "infective-immune" diseases such as rheumatoid arthritis. 来自疾病部位的淋巴细胞提示“感染-免疫”疾病如类风湿关节炎可能的微生物病因。
Infectious agents and disease Pub Date : 1996-10-01
D K Ford, A J Tingle
{"title":"Lymphocytes from site of disease indicate probable microbiological etiology of \"infective-immune\" diseases such as rheumatoid arthritis.","authors":"D K Ford,&nbsp;A J Tingle","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Synovial lymphocytes, from the site of disease, by their response to microbiological antigen stimulation as measured by the [3H]thymidine uptake method, indicate the microbiological causes of reactive arthritis and also oligoarthritis unassociated with enteric or genital symptoms. In the study of the etiology and pathogenesis of rheumatoid arthritis, the application of the same procedures gives an indication that the disease is an immune response to a variety of common infective agents, both viral and bacterial. The demonstration of antigens or nucleic acid of an infective agent at the site of disease, in association with a specific local immune response suggests the pathogenetic importance of the agent. Recent studies of relationships between epitopes of infective agents and MHC gene products suggest several ways in which infective agents can directly cause a disease such as rheumatoid arthritis without any requirement for autoimmune contributions. Because the infective agent may be the primary determining factor and the one most amenable to correction or eradication, the term \"infective-immune\" is suggested in preference to \"autoimmune\" for these immune-mediated diseases.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"223-30"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Immunization strategy for prevention of congenital cytomegalovirus infection. 预防先天性巨细胞病毒感染的免疫策略。
Infectious agents and disease Pub Date : 1996-10-01
R F Pass
{"title":"Immunization strategy for prevention of congenital cytomegalovirus infection.","authors":"R F Pass","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Women of childbearing age are a logical target for a vaccine aimed at prevention of congenital cytomegalovirus (CMV) infections. However, the impact of a CMV vaccine could likely be enhanced by considering the sources of maternal infection and characteristics of mothers of infected newborns. Contact with preschool-age children and sexual activity are important sources of CMV infection for young women. Approximately half of infants with congenital CMV infection in the U.S. are born to unmarried, adolescent mothers. To prevent CMV infection in those who are the sources of maternal infection as well as in young, unmarried mothers, universal immunization of toddlers and preteen children should be considered.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"240-4"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The pathogenesis of AIDS: lessons learned from other medical conditions. 艾滋病的发病机制:从其他疾病中吸取的教训。
Infectious agents and disease Pub Date : 1996-10-01
P D Griffiths, R D Whitley
{"title":"The pathogenesis of AIDS: lessons learned from other medical conditions.","authors":"P D Griffiths,&nbsp;R D Whitley","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"231-9"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determinants of Helicobacter pylori pathogenicity. 幽门螺杆菌致病性的决定因素。
Infectious agents and disease Pub Date : 1996-10-01
A Labigne, H de Reuse
{"title":"Determinants of Helicobacter pylori pathogenicity.","authors":"A Labigne,&nbsp;H de Reuse","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Helicobacter pylori is a recently recognized bacterial pathogen associated with diverse pathologies of varying severity, such as chronic gastritis, peptic ulceration, mucosa-associated lymphoid tissue (MALT) lymphoma, and gastric carcinoma. We here present a review of our current knowledge on the properties of H. Pylori that adapt it to its particular niche by allowing it to survive in the stomach and to colonize the gastric mucosa, as well as those that underlie its persistence and pathogenicity. While the bacterial determinants that preclude the persistent colonization of the gastric mucosa are better understood, those associated with pathogenicity appear to result from the possibility for some of the bacteria of the species to synthesize products that directly or indirectly damage the gastric mucosa, cause a persistent inflammatory reaction, and/or perturb the regulation of acid secretion.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"191-202"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Aspergillus infections: problems in diagnosis and treatment. 曲霉感染:诊断和治疗中的问题。
Infectious agents and disease Pub Date : 1996-10-01
P E Verweij, J P Donnelly, B E De Pauw, J F Meis
{"title":"Aspergillus infections: problems in diagnosis and treatment.","authors":"P E Verweij,&nbsp;J P Donnelly,&nbsp;B E De Pauw,&nbsp;J F Meis","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"245-6"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Kaposi's Sarcoma (KS)-associated herpesvirus and its role in KS. 卡波西肉瘤(KS)相关疱疹病毒及其在KS中的作用。
Infectious agents and disease Pub Date : 1996-10-01
Y Chang, P S Moore
{"title":"Kaposi's Sarcoma (KS)-associated herpesvirus and its role in KS.","authors":"Y Chang,&nbsp;P S Moore","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Epidemiologic studies have long suggested that Kaposi's sarcoma (KS) is caused by a sexually transmissible infectious agent. A new, and presumably human, herpesvirus, Kaposi's sarcoma-associated herpesvirus (KSHV/HHV-8), has been detected in KS lesions from AIDS patients by sequence-based detection techniques. KSHV is present in almost all KS lesions from all forms of KS. The virus is a Rhadinovirus or gamma-2 herpesvirus most closely related to Herpesvirus saimiri (HVS), and possesses several genes that may allow it to modify its host cell environment. KSHV has been isolated in vitro with immortalized B cell lines derived from a second malignancy associated with KSHV, body cavity-based lymphomas (BCBL). Epidemiologic studies performed to date indicate that KSHV, unlike other human herpesviruses (HHV), is not ubiquitous. The growing body of evidence indicates that KSHV is a potent oncogenic herpesvirus and the likely infectious cause of KS and BCBL.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 4","pages":"215-22"},"PeriodicalIF":0.0,"publicationDate":"1996-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19849610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The biology of rickettsiae. 立克次体的生物学。
Infectious agents and disease Pub Date : 1996-06-01
T Hackstadt
{"title":"The biology of rickettsiae.","authors":"T Hackstadt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Rickettsiae are bacterial obligate intracellular parasites ranging from harmless endosymbionts to the etiologic agents of some of the most devastating diseases known to mankind. Rickettsiae are primarily associated with arthropod vectors in which they may exist commensally and, in most cases, only accidentally infect humans. These fascinating microbes are the prototypical obligate intracellular parasites. Other than being extremely fastidious in their growth requirements, however, rickettsiae are typical gram-negative bacteria. Only a few intracellular parasites multiply within the cytoplasm of eukaryotic cells. In this environment, rickettsiae are provided with a rich source of biosynthetic precursors not normally encountered by free-living bacteria and have evolved a number of unique mechanisms to transport such metabolites as nucleotides and nucleotide sugars. The physiologic basis for their obligate parasitism, however, has remained elusive for > 90 years. Other than the obvious property of replicating inside eukaryotic cells, the molecular mechanisms of cellular damage are ill defined. The typhus-group rickettsiae multiply within host cells to great numbers without profound damage until lysis occurs. In contrast, the spotted fever-group rickettsiae spread rapidly from cell to cell by an actin-based motility. This property, in itself, is not sufficient to cause cell death, because avirulent spotted fever-group rickettsiae also spread by actin-based movement but do not cause lysis of the host cell. Despite the obvious limitations imposed by their obligate intracellular lifestyle and the current lack of methods for genetic manipulation, there are enough interesting biological properties of rickettsiae to offer an attractive area for research.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 3","pages":"127-43"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19775175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Invasive group A streptococcal disease. 侵袭性A群链球菌病。
Infectious agents and disease Pub Date : 1996-06-01
D L Stevens
{"title":"Invasive group A streptococcal disease.","authors":"D L Stevens","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The emergence of severe group A streptococcal (GAS) infection since the 1980s has now been reported from most parts of the world. Many of these cases have been associated with deep-seated infection associated with shock and multiple-organ failure and are defined as streptococcal toxic shock syndrome (StrepTSS). Strains of GAS isolated from patients with invasive disease have been predominantly of M types 1 and 3, which produce either pyrogenic exotoxin A or B or both. In this article, the clinical and demographic features of streptococcal bacteremia, myositis, and necrotizing fasciitis are presented and compared with those of StrepTSS. Current concepts about the pathogenesis of invasive streptococcal infection are also discussed, in terms of the interaction between GAS virulence factors and host-defense mechanisms. Finally, the efficacy of clindamycin, the failure of penicillin, and new ideas for future treatment of serious streptococcal infections are outlined.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 3","pages":"157-66"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19774401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ticks and Borrelia: model systems for investigating pathogen-arthropod interactions. 蜱和伯氏疏螺旋体:研究病原体-节肢动物相互作用的模型系统。
Infectious agents and disease Pub Date : 1996-06-01
T G Schwan
{"title":"Ticks and Borrelia: model systems for investigating pathogen-arthropod interactions.","authors":"T G Schwan","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Blood-feeding arthropods transmit numerous types of infectious agent and parasite that have a tremendous impact on human health and mortality throughout the world. These vector-borne pathogens display a wide array of evolutionary patterns that allow them to infect and to be successfully transmitted by ticks, mites, and hematophagous insects. The vector's method of feeding, type of development, and host preference are also critical factors for the transfer of zoonotic agents from wild animal reservoirs to susceptible humans. Ticks are obligate blood-feeders in all life stages and biologically transmit many infectious agents. In North America, two ticks that are involved in the maintenance and transmission of pathogenic spirochetes include Ixodes scapularis (family Ixodidae) and Ornithodoros hermsi (family Argasidae). These ticks are the respective vectors of the Lyme disease spirochete Borrelia burgdorferi and a relapsing fever spirochete, Borrelia hermsii. Little is known concerning how these and related species of Borrelia adapt to successfully alternate between warm-blooded vertebrates and ticks; however, the possibility that borrelial surface proteins are differentially expressed in their different hosts is an exciting area of current research.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"5 3","pages":"167-81"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19774402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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