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Query: UMLS:C0009450 (infectious diseases)
 83,438 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

It was shown that infection of E. coli cells by phage T4 is suppressed, when the cells are treated by oxidative phosphorylation uncouplers. The inhibiting effects of the uncouplers manifest themselves at the stage of phage DNA entry into the cells. Study of the E. coli cells devoid of their H+-ATPase activity due to mutation showed that the infection is suppressed by a switch-off of the respiratory chain, the only generator of the proton motive force (PMF) in mutated cells. Infection of the E. coli cells containing intact H+-ATPase occured even in the case when the respiratory chain activity was inhibited. The kinetic studies showed that generation of PMF is necessary during phage DNA transport into the cells and is indispensable for phage DNA entry into bacterial cells.
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PMID:[Role of proton motive force in the infection of E. coli K-12 cells by bacteriophage T4]. 3 41

The part played by the phagocytic cells against invading pathogens has been known since the work of Metchnikoff nearly a century ago. This review deals primarily with the role of the neutrophilic polymorphonuclear leukocyte in host defense against microbial infections. The overall function of these cells in protection from infection is dependent on a number of steps. First, an adequate number of functionally mature neutrophils have to be produced and released into the circulation by the bone marrow. Cells must circulate normally and be capable of adhering to capillary and venule walls overlying inflammatory sites. The next step involves the exit of phagocytes from the blood stream through the capillary wall and emigration into the tissues to establish contact with the invading pathogens. This process is accomplished by the locomotive characteristics of these cells and chemotaxis. Most organisms must then be phagocytized to be killed. Two discrete phases are involved in phagocytosis; the "recognition" and attachment phase followed by the ingestion phase. After phagocytosis a series of coordinated morphologic and biochemical events are set into motion which leads to eventual death and lysis of the ingested microbes. A variety of antimicrobial mechanisms are involved in this final step and indicate that these cells have an appreciable reserve capacity if one mechanism is impaired. Recent evidence which clarifies mechanisms involved in all these stages is discussed.
Infection 1979
PMID:Neutrophil function and host resistance. 3 68

Patients who received bone marrow transplantation (= BMT) for the treatment of severe combined immunodeficiency (= SCID), and who were reported in the medical literature from 1968 to 1977, were collected and analysed. Eighteen of these 80 children are still alive, 10 months to 9 years after transplantation. It is thus the first successful form of therapy for this otherwise invariably fatal disease. Fifteen of the 18 survivors received bone marrow cells from HLA and MLC compatible donors; the remaining 3 survivors received grafts from MLC-compatible but HLA-incompatible donors. Bone marrow transplantation is the treatment of choice for SCID when recipient and donor are HLA- and MLC-identical. All patients who received MLC-incompatible grafts died, and bone marrow transplantation for SCID from MLC-incompatible donors should be abandoned. Milt-to-severe graft-versus-host disease (= GVHD) occurred in spite of HLA- and/or MLC-compatibility, with some correlation to the number of cells transplanted. This should preferably be kept below 50 million cells per kilo body weight. Infection was the chief cause of death in all groups. Strict reverse isolation, bowel decontamination and routine pre- and post-transplant Pneumocystis carinii prophylactic treatment are recommended. The clinical picture and laboratory findings of these 80 children before BMT did not differ from non-transplanted SCID patients. Three of the 18 survivors are adenosinedeaminase deficient.
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PMID:Bone marrow transplantation for severe combined immunodeficiency disease. Reported from 1968 to 1977. 3 63


Infection 1979
PMID:Abstracts of an international symposium on viral hepatitis, 5-7 April 1979, Munich. 4 10

Tympanocentesis was performed in 32 pediatric patients with chronic recurrent suppurative otitis media. The aspirate was cultured aerobically and anaerobically. Aerobes were isolated from ten patients (31.2%); anaerobes from one patient; and both aerobes and anaerobes from 21 patients (65.6%). There were 46 aerobic isolates. The aerobes commonly recovered were Pseudomonas aeruginosa (24 isolates) Proteus sp. (5) and Staphylococcus aureus (3). There were 32 anaerobes isolated including anaerobic gram-positive cocci (19 isolates) and Bacteroides sp., the latter of which included Bacteroides fragilis group and Bacteroides melaninogenicus (9). The patients were treated by parenteral carbenicillin 300 to 400 mg per kg per day given in four dosages administered for a period of 12 to 21 days (average 17 days). An aminoglycoside (gentamicin) was added in 15 patients. The clinical response was good in 17 patients and poor in 15. There were no side effects or adverse reactions noted during therapy. The above findings demonstrate the polymicrobial etiology of chronic recurrent suppurative otitis media and suggest that treatment directed against the aerobic and anaerobic isolates is efficacious in more than half of the cases.
Infection 1979
PMID:Anaerobic isolates in chronic recurrent suppurative otitis media. Treatment with carbenicillin alone and in combination with gentamicin. 4 11


Infection 1979
PMID:Studies on trimethoprim/sulphonamide developments. Proceedings of a Symposium. 19--23 September, 1978, Corfu, Greece. 4 12


Infection 1979
PMID:Studies on aminopenicillin developments. Proceedings of a symposium. 19--23 September, 1978. Corfu, Greece. 4 13

Infection with N. gonorrhoeae stimulates the production of antibodies to many common, species-specific, and type-specific antigens. The L-antigen is an envelop antigen and antibodies to it could be demonstrated by various methods in more than 90% of the patients after the first 10 days of infection. Serologic tests are not yet available in the United States. If and when they become available, they may be recommended for: (1) Screening asymptomatic men and women, (2) Use as an adjunct diagnostic tool in cases of prostatitis, arthritis, disseminated gonococcal infection, and pelvic inflammatory disease, (3) Use (alone or in conjunction with culture) when specimens must be mailed to a central laboratory, when mailing conditions do not allow for incubation within 24-48 hr, or when proper media and qualified bacteriologists are not available.
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PMID:Serologic diagnosis of gonococcal infection. 4 12

A tick/rickettsial survey in various parts of Switzerland revealed the presence of a new, hitherto undescribed spotted fever group rickettsia ("Swiss agent") in up to 11.7% of I. ricinus collected off vegetation. Infection in ticks was found to be generalized with rickettsiae developing intracellularly and occasionally also intranuclearly. As a result of massive growth in ovarial tissues, including the germinative cells, the rate of transovarial and filial infection was 100%. The "Swiss agent" appears to be nonpathogenic for guinea pigs, domestic rabbits, and Swiss mice, but in male meadow voles (Microtus pennsylvanicus) it produces a microscopically detectable infection in the tunica vaginalis. The rickettsia grows well in tissue culture systems including chick embryo fibroblast, Vero, and vole tissue cells, when inoculated via yolk sac into 5-day-old hens' eggs, it kills 100% of the embryos after 5 to 7 days. Antigenic relatedness of the "Swiss agent" to rickettsiae of the spotted fever group was indicated by indirect and direct fluorescent antibody staining. Preliminary serologic typing by microimmunofluorescence and by microagglutination indicated that the "Swiss agent" differs from all prototype strains of spotted fever group rickettsiae studied so far.
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PMID:Ixodes ricinus: vector of a hitherto undescribed spotted fever group agent in Switzerland. 4

Macroconidia of Sporidesmium sclerotivorum, a mycoparasite of Sclerotinia spp., germinated after 3 days in soil adjacent to sclerotia of S. minor and on membrane filters placed on soil containing sclerotia. Germination increased with time up to 18 days and with concentration of sclerotia. Conidia as distant as 9 mm from single sclerotia germinated. Germination of conidia was maximum on a sclerotial agar medium in the range of pH 5 to pH 7. Cultivation of S. sclerotivorum parasitically on living sclerotia proceeded optimally in moist, fine quartz sand amended with 1 to 2% (w/w) sclerotia and 0.07% (w/w) CaCO3, at 25 degrees C. Infection of sclerotia in sand reached 100% by 5 weeks. Conidia production paralled infection resulting in logarithmic increase in numbers; a maximum of 3 x 10(5) to 4 x 10(5) conidia/g was reached in 6 to 12 weeks. Viability of air-dried sand-sclerotial cultures of S. sclerotivorum was reduced after 1 and 6 days, but viability was undiminished in air-dried soil. Sporidesmium sclerotivorum survived in moist and air-dried soils stored at room temperature for 15 months.
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PMID:Factors affecting germination, mycoparasitism, and survival of Sporidesmium sclerotivorum. 4 22


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