Infectious agents and disease最新文献

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Antifungal drug targets: Candida secreted aspartyl protease and fungal wall beta-glucan synthesis. 抗真菌药物靶点:念珠菌分泌的天冬氨酸蛋白酶和真菌壁β -葡聚糖合成。
Infectious agents and disease Pub Date : 1995-12-01
R C Goldman, D J Frost, J O Capobianco, S Kadam, R R Rasmussen, C Abad-Zapatero
{"title":"Antifungal drug targets: Candida secreted aspartyl protease and fungal wall beta-glucan synthesis.","authors":"R C Goldman,&nbsp;D J Frost,&nbsp;J O Capobianco,&nbsp;S Kadam,&nbsp;R R Rasmussen,&nbsp;C Abad-Zapatero","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The incidence of severe, life-threatening fungal infections has increased dramatically over the last decade. Unfortunately, in practice the arsenal of antifungal drugs is limited to flucytosine, a few approved azoles, and polyenes, mainly amphotericin B. This situation is rather precarious in view of the extended spectrum of fungi causing severe disease in immunocompromised patients, development of resistance to some of the currently used agents, and the minimal fungicidal activity of the azoles. Although lagging behind the need for new antifungal agents, the study of fungal biochemistry, physiology, and genetics has undergone a resurgence to new heights of activity, thus providing a framework on which to build drug discovery programs in several new areas, two of which will be discussed in detail: the biology of Candida albicans secreted aspartyl protease with respect to inhibitor discovery, evaluation, and possible clinical utility; and the fungal cell wall beta-glucans with respect to the mechanism and regulation of synthesis and target sites for drug inhibition.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 4","pages":"228-47"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19641421","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
Nosocomial candidiasis: epidemiology and drug resistance. 院内念珠菌病:流行病学和耐药性。
Infectious agents and disease Pub Date : 1995-12-01
R Mahayni, J A Vazquez, M J Zervos
{"title":"Nosocomial candidiasis: epidemiology and drug resistance.","authors":"R Mahayni,&nbsp;J A Vazquez,&nbsp;M J Zervos","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The epidemiology of nosocomial Candida is complex. Molecular DNA analysis has provided useful information in the study of nosocomial infection. The most important inpatient hospital reservoir is colonized patients. Most patients are infected with strains they harbor. Findings from recent studies suggest that some nosocomial Candida colonization is the result of exogenous acquisition. Hospital personnel and the inanimate hospital environment may serve as reservoirs, reservoir and they may be sources of acquired strains. The mechanism by which patients acquire Candida remains unproven, but most authors agree that indirect contact transmission is the most likely route for exogenous nosocomial acquisition of strains. Environmental surfaces in contact with healthcare workers and/or patients should also be considered a source of some Candida organisms when infection control measures are designed. Antifungal drug resistance has not been responsible for the spread of isolates. Further prospective studies using DNA typing methods for analysis of cultures using control strains are needed to define more clearly the patient and hospital reservoirs of infection and the modes of transfer. With increasing knowledge of the epidemiology of nosocomial Candida, novel control strategies are needed.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 4","pages":"248-53"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19641422","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
Pathogenic potential of myeloblastosis-associated viruses. 髓母细胞病相关病毒的致病潜力。
Infectious agents and disease Pub Date : 1995-12-01
B Perbal
{"title":"Pathogenic potential of myeloblastosis-associated viruses.","authors":"B Perbal","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Myeloblastosis-associated viruses (MAV) are replication competent avian retroviruses responsible for the induction of lymphoid leukosis, osteopetrosis, and nephroblastoma. Although both the route of infection and the strain of host used has been reported to be a critical factor in determining the outcome of viral infection, genetically distinct strains of MAV that exhibit a multiple pathogenic potential have been molcularly cloned. Osteopetrosis is a proliferative disease of the bones and nephroblastoma is a kidney cancer. Both diseases occur in chickens a few weeks after MAV injection. In both cases, the nature of the target cells and mechanisms of transformation induced by MAV remain to be established. Molecular cloning and sequencing of three MAV proviral genomes inducing both osteopetrosis and nephroblastoma or only nephroblastoma have allowed the identification of viral determinants essential for osteopetrosis induction. For the last decade we have focused our attention on the MAV-induced nephroblastoma because it is a unique animal model of the human Wilms' tumor. Studies that we have conducted to understand the molecular basis of MAV tumorigenic potential have led to the identification of viral sequences required for tumor induction and to the discovery of a new cellular gene (nov) likely to play a critical role in avian and human nephroblastoma development.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 4","pages":"212-27"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19640910","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
Preterm labor: emerging role of genital tract infections. 早产:生殖道感染的新角色。
Infectious agents and disease Pub Date : 1995-12-01
W W Andrews, R L Goldenberg, J C Hauth
{"title":"Preterm labor: emerging role of genital tract infections.","authors":"W W Andrews,&nbsp;R L Goldenberg,&nbsp;J C Hauth","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Preterm birth complicates 8-10% of all pregnancies in the United States and is the leading cause of infant morbidity and mortality. Neonatal morbidity and mortality is concentrated among very low-birthweight and extremely premature infants, particularly those delivered prior to 30 weeks' gestational age. In addition to the contribution of preterm birth to neonatal morbidity and mortality, the economic costs associated with this pregnancy complication are staggering. Efforts to reduce the preterm birth rate have been largely focused on prevention and early intervention with treatment for preterm labor. Mixed results regarding the success of prematurity prevention programs have been reported, and controversy continues to surround the efficacy of tocolytic therapy in the treatment of preterm labor. Although neonatal survival for infants born at early gestational ages has steadily improved in recent years, survival of infants delivered prior to 24 weeks' gestation remains very poor. Additionally, despite this decline in neonatal mortality, the United States still lags behind most industrialized nations in infant mortality, and no change in the rate of low birthweight has occurred in recent decades. Multiple lines of evidence support a role for infection as an etiologic factor in preterm labor. Although this association has been well known for many years, a wealth of new data is emerging, linking subclinical genital tract infection with spontaneous preterm birth, particularly among pregnancies that result in birth prior to 30 weeks' gestational age as a result of spontaneous preterm labor or preterm, premature rupture of membranes. Conversely, preterm birth that occurs closer to term is less likely to be associated with genital tract infection. Improved understanding of the link between genital tract infection and preterm birth now provides an exciting potential for the development of sensitive new markers to identify women at risk and effective interventions to prevent preterm birth. A review and comment on this growing literature is provided.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 4","pages":"196-211"},"PeriodicalIF":0.0,"publicationDate":"1995-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19640908","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
Controversies in the treatment of cytomegalovirus retinitis: foscarnet versus ganciclovir. 治疗巨细胞病毒性视网膜炎的争议:氟膦酸钠与更昔洛韦。
Infectious agents and disease Pub Date : 1995-09-01
D A Jabs
{"title":"Controversies in the treatment of cytomegalovirus retinitis: foscarnet versus ganciclovir.","authors":"D A Jabs","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Cytomegalovirus (CMV) retinitis is the most common intraocular infection in patients with AIDS. Untreated, CMV retinitis is a binding disease. Ganciclovir, a nucleoside analog, and foscarnet, a pyrophosphate analog, are both effective in controlling CMV retinitis. A randomized, controlled, comparative trial of foscarnet and ganciclovir demonstrated that they were equivalent in terms of controlling CMV retinits, but that foscarnet was associated with a longer survival, possibly due to an antiretroviral effect of foscarnet. However, foscarnet was less well tolerated than ganciclovir, primarily due to the nature of its side effects. Because foscarnet and ganciclovir have different side effects, initial treatment of CMV retinitis should be individualized. Newer technological developments, including oral ganciclovir and the ganciclovir intraocular device, may influence the choice of initial treatment, particularly because of their effect on the quality of life when compared to chronic intravenous therapy. The occurrence of relapse and the development of resistance remain long-term concerns, which may alter the use of anti-CMV drugs over time.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"131-42"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19528411","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
Will pathologists play as important a role in the future as they have in the past against the challenge of infectious diseases. 病理学家将在未来扮演重要的角色,因为他们在过去对传染病的挑战。
Infectious agents and disease Pub Date : 1995-09-01
D H Walker, J S Dumler
{"title":"Will pathologists play as important a role in the future as they have in the past against the challenge of infectious diseases.","authors":"D H Walker,&nbsp;J S Dumler","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Since the recognition less than 120 years ago that organisms visible only microscopically are capable of causing human diseases, pathologists have played a major role in identifying and characterizing the etiologic infectious agents and in elucidating the pathogenic mechanisms. In face of the opportunities and challenges presented by molecular technology, AIDS and other emerging infections, and the evolution of health care systems, it is worthwhile to question whether the field of pathology will continue in the future to make major contributions in the field of infectious diseases. The AIDS epidemic has awakened pathologists to the need to reemphasize infectious diseases in diagnostic anatomic and clinical pathology, basic and applied research, and medical and scientific education. The knowledge and skills of pathologists are uniquely critical to the achievement of efficient advances in infectious diseases, and will remain so provided that pathologists embrace molecular science and apply it as a principal component in their methodologic and conceptual armamentarium.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"167-70"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19530236","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
Blood-feeding arthropods: live syringes or invertebrate pharmacologists? 吸血节肢动物:活体注射器还是无脊椎动物药理学家?
Infectious agents and disease Pub Date : 1995-09-01
J M Ribeiro
{"title":"Blood-feeding arthropods: live syringes or invertebrate pharmacologists?","authors":"J M Ribeiro","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The habit of blood feeding evolved independently several times among the > 14,000 species and 400 genera of hematophagous arthropods. The specific need to remove blood from the host's skin led to sophisticated mechanical adaptations in invertebrate mouthparts. Moreover, the need to counteract the vertebrate host's hemostasis led to the evolution of salivary antihemostatic compounds injected into the host by these same mouthparts. The convergent evolution scenario for hematophagy has resulted in a large diversity of salivary anticlotting, antiplatelet, and vasodilatory substances. Thus, in addition to excelling as phlebotomists, hematophagous arthropods excel as pharmacologists.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"143-52"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19530233","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
Morbilliviruses and morbillivirus diseases of marine mammals. 海洋哺乳动物的麻疹病毒和麻疹病毒疾病。
Infectious agents and disease Pub Date : 1995-09-01
R L de Swart, T C Harder, P S Ross, H W Vos, A D Osterhaus
{"title":"Morbilliviruses and morbillivirus diseases of marine mammals.","authors":"R L de Swart,&nbsp;T C Harder,&nbsp;P S Ross,&nbsp;H W Vos,&nbsp;A D Osterhaus","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In recent years, serious disease outbreaks among seals and dolphins were attributed to infection with established or newly recognized morbilliviruses. The first identification of a morbillivirus as causative agent of mass mortality among marine mammals was in 1988, when the previously unrecognized phocine distemper virus (PDV) caused the death of 20,000 harbor seals (Phoca vitulina) in northwestern Europe. A similar epizootic among Baikal seals (Phoca sibirica) in Siberia in 1987 was later attributed to infection with canine distemper virus (CDV). A morbillivirus isolated from stranded harbor porpoises (Phocoena phocoena) between 1988 and 1990 proved to be yet another new member of the genus Morbillivirus, distinct from PDV and CDV and more closely related to rinderpest virus and peste-des-petits-ruminants virus: porpoise morbillivirus. A similar virus, dolphin morbillivirus, was the primary cause of mass mortality among striped dolphins (Stenella coeruleoalba) in the Mediterranean from 1990 to 1992. In this review, current knowledge of the genetic and antigenic relationships of these viruses is presented, and the origin and epizootiological aspects of the newly discovered morbilliviruses are discussed. In addition, the possible contributory role of environmental contaminant-related immunosuppression in the severity and extent of the different disease outbreaks is discussed.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"125-30"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19528410","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
Specialized surface adaptations of Giardia lamblia. 贾第鞭毛虫的特殊表面适应性。
Infectious agents and disease Pub Date : 1995-09-01
S B Aley, F D Gillin
{"title":"Specialized surface adaptations of Giardia lamblia.","authors":"S B Aley,&nbsp;F D Gillin","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Although Giardia lamblia trophozoites were first described by Von Leeuwenhoek in his own diarrheic stool, relatively little is known of the basic biology of this common parasite or the pathophysiology of giardiasis. In particular, there is little specific information about trophozoite properties that cause diarrhea, as neither toxins nor conventional virulence factors have been identified. Therefore, parasite adaptations that promote cyst survival in the external environment and infection and trophozoite persistence in the small intestine, may be viewed as key virulence properties. This review focuses on unusual surface structures of the trophozoite and cyst forms that enable Giardia to be such a successful parasite.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"161-6"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19530235","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
Herpes simplex virus resistance to acyclovir: clinical relevance. 单纯疱疹病毒对阿昔洛韦的耐药性:临床相关性。
Infectious agents and disease Pub Date : 1995-09-01
J C Pottage, H A Kessler
{"title":"Herpes simplex virus resistance to acyclovir: clinical relevance.","authors":"J C Pottage,&nbsp;H A Kessler","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Herpes simplex virus (HSV) infections are very common in the general population and can be treated with the nucleoside analogue acyclovir. Acyclovir is initially phosphorylated intracellularly in HSV-infected cells by a viral-specific thymidine kinase to acyclovir-monophosphate. The monophosphate is subsequently di- and triphosphorylated by host cellular kinases to the active form of the drug, which inhibits HSV DNA polymerase and incorporates into the elongating viral DNA and causes chain termination. Acyclovir resistance has been increasingly described and is caused by mutations in either the thymidine kinase or the DNA polymerase genes. These mutations result in decreased or absent HSV thymidine kinase production, altered affinity of the thymidine kinase for acyclovir-triphosphate, or altered affinity of the HSV DNA polymerase for acyclovir-triphosphate. Thymidine kinase deficiency accounts for approximately 95% of acyclovir-resistant isolates. Clinical disease due to acyclovir-resistant HSV occurs primarily in immunocompromised patients and is usually characterized by a chronic, progressive ulcerative mucocutaneous disease with prolonged shedding of virus. Several large surveys have been done in an effort to determine the incidence of in vitro and clinical acyclovir resistance. Among immunocompetent hosts, even those who have received > or = 6 years of continuous acyclovir, the prevalence of acyclovir-resistant isolates has remained stable at approximately 3%. Only three cases of clinical resistance of HSV to acyclovir have been reported. However, the incidence in immunocompromised patients, particularly those with AIDS and those who have had bone marrow transplants, is increasing. Transmission of acyclovir-resistant isolates from person to person has not been documented, but due to the increased use of acyclovir and newer drugs, such as famciclovir, there is great concern that this transmission might occur in the future. Continued surveillance in both immunocompetent and immunocompromised hosts for the development of clinical acyclovir-resistant HSV disease is necessary.</p>","PeriodicalId":77176,"journal":{"name":"Infectious agents and disease","volume":"4 3","pages":"115-24"},"PeriodicalIF":0.0,"publicationDate":"1995-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"19528408","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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