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Results for “STAPHYLOCOCCAL INFECTIONS”

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At least 163 records · Page 9Linked to original sources
PubMed1989

[The role of cellular and humoral factors of body resistance in the development of experimental influenza-staphylococcal infections in mice].

The clinico-experimental studies of mixed influenza-staphylococcal infection constantly point to the development of the aggravation of the infectious process due to the synergic action of the bacterial and viral infective agents. But, as shown by the authors of the present work, in those cases when the experimental infection with the virus was preceded by staphylococcal infection by 72 hours no synergism was observed. In cases of infection with adaptogenic virus the mortality rate of mice resulting from meningococcal infection was twice as low. The possible explanation of this fact is discussed.

Animals↗
PubMed1985

Humoral and cellular factors affecting the neutrophil response of the locally immunised mammary gland to staphylococcal infection.

Locally immunising the non-lactating ovine mammary gland by infusing killed Staphylococcus aureus enhances neutrophil accumulation in mammary secretion during subsequent staphylococcal infection. Immunological factors influencing this increased neutrophil response were studied in the present experiments. Glands locally immunised with killed Brucella abortus supported a greater neutrophil response to staphylococcal infection than did glands immunised with killed S. aureus. An enhanced neutrophil response to staphylococcal infection was recorded in 3 of 7 ewes locally immunised with zymosan. Passive immunisation by intramammary infusion of secretions from immunised glands conferred an enhanced neutrophil response during staphylococcal infection. Absence of haemolytic complement in secretions of immunised glands suggested complement was not implicated in the response. Secretions of immunised glands contained elevated concentrations of mononuclear cells. When exudates rich in mononuclear cells were established by infusion of endotoxin into non-immunised glands there was no increase in the neutrophil response to subsequent staphylococcal infection. However, when the mononuclear cell concentration was elevated by intramammary infusion of staphylococcal antigens in systemically immunised ewes there was an increase in the neutrophil response to subsequent infection. Thus humoral and cellular characteristics of the locally immunised mammary gland influence the kinetics of the neutrophil influx during staphylococcal infection.

Animals↗
PubMedDate not supplied

Rifampin in the treatment of serious staphylococcal infections.

Eight patients with serious staphylococcal infections such as endocarditis, meningitis, epidural abscess, shunt and graft infections were treated with nafcillin, cephalothin or vancomycin in combination with rifampin. In vitro antibiotic sensitivities demonstrated that the Staphylococcus aureus and Staphylococcus epidermidis were highly sensitive to rifampin with minimum inhibitory and bactericidal levels of .0078-.25 micrograms/ml. In all patients reviewed and reported, when serum bactericidal levels were measured before and after the addition of rifampin, there was a positive correlation between microbiological and clinical outcome. Thus, in selected patients with life-threatening infections caused by S. aureus and S. epidermidis rifampin should be considered an adjunctive therapy.

Adult↗
PubMedDate not supplied

Personal reflections on nosocomial staphylococcal infections and the development of hospital surveillance.

A pandemic of staphylococcal infections occurred in the mid-twentieth century and spanned the years from about 1946 (with gradual subsidence) to about 1966. Staphylococcus aureus, originally sensitive to penicillin in 1942, demonstrated, more than other susceptible bacteria, a capacity for the development of antibiotic resistance. Hospital personnel became carriers of antibiotic-resistant staphylococci that contaminated newborn infants and hospitalized children and adults, who then became carriers and suffered an increasing incidence of suppurative disease. Asymptomatic carriers of antibiotic-resistant epidemic strains spread them into communities, with resulting infection of others. Newer antibiotics were developed, only to lose effectiveness as the staphylococci developed resistance. Local, national, and international programs emerged for the development of epidemiologic research, hospital surveillance, and education in methods of prevention and control. Carrier rates of S. aureus among hospital personnel remained approximately 33%, while the incidence of nosocomial staphylococcal infections declined. Staphylococcal pandemics may be cyclic in occurrence.

Communicable Disease Control↗
PubMed2002

[Therapeutic principles of staphylococcal infections--Role and limitations of standard compounds].

Antibiotic therapy plays an important (but not exclusive) role in the treatment of staphylococcal infections. Measures aimed at reducing the bacterial inoculum through local procedures must be envisaged as often as possible. The removal of any foreign, infected materials is essential to success. In this article, we review the different, active antibiotics available, their advantages and disadvantages and their indications. In the light of these data, we propose a therapeutic approach to severe bacterial infection caused by a cluster of Gram-positive cocci. Staphylococcal infections pose daily therapeutic problems, whether in open-care practice or intensive care units. The specificity of staphylococcal infections encountered in an intensive care setting require a therapeutic approach which takes account of the context, and particularly of the incidence of resistant staphylococcal infections.

Anti-Bacterial Agents↗
PubMedDate not supplied

Heterophil chemotaxis in chickens with natural Staphylococcal infections.

Heterophil chemotaxis using heterophils isolated from the peripheral blood of five commercial broiler chickens naturally infected with staphylococcal bacteria was compared by the modified Boyden-chamber technique with chemotaxis of heterophils from two chickens from the same flock not infected with Staphylococcus (field controls) and from four healthy laboratory control broiler chickens. The infected chickens had gross and histologic lesions of staphylococcal tenosynovitis and osteomyelitis. Staphylococci were isolated from the lesions. Hematologic parameters and histologic lesions of infected chickens also were examined. Compared with field and laboratory controls, Staphylococcus-infected chickens had heterophilic leukocytosis. The heterophils of Staphylococcus-infected chickens had significantly lower chemotactic activity than both control groups in terms of random movement and directed chemotactic movement in response to stimulus. Toxic changes were observed in heterophils of some of the Staphylococcus-infected broilers.

Animals↗
PubMed1996

Nosocomial coagulase-negative staphylococcal infections in bone marrow transplantation recipients with central vein catheter. A 5-year prospective study.

The purpose of this study was to examine coagulase-negative staphylococcal infections in bone marrow transplantation (BMT) patients with central vein catheters by investigating incidence, clinical relevance, risk factors, methicillin resistance, clinical impact of initial empiric antimicrobial therapy without vancomycin, and management of documented catheter-related infections. A 5-year prospective study was conducted with daily evaluation of 242 BMT patients during hospitalization, including clinical assessment and blood culture via the Hickman/Broviac catheter. If fever or infected appearance occurred, peripheral blood cultures or exit site cultures, respectively, were done. Results showed a septicemia incidence of 7.0%, including in 6 patients following colonization, in 1 patient with tunnel infection, in 1 patient with thrombophlebitis, in 1 patient with exit site infection, and in 8 patients with septicemia of unknown origin. Total colonization incidence was 7%, with colonization only in 11 patients who had 16 episodes; incidence of exit site infection was 3.7%. Age > or = 18 years was the only identified risk factor for developing staphylococcal infection (P = 0.03). Despite a methicillin resistance rate of 45% and omission of vancomycin from the routine initial empiric antimicrobial regimen, the clinical course of coagulase-negative staphylococcal infections was relatively benign. A single patient, who experienced marrow rejection, died on day +31 with septicemia and only one patient experienced microbiological failure with recurrent colonization. Bacteria grown in both aerobic and anaerobic bottles were more likely true bacteremia than contaminant (P = 0.03). We conclude that the hazard of coagulase-negative staphylococcal infection does not mandate inclusion of a glycopeptide in the initial empiric antimicrobial regimen in BMT patients, even during febrile neutropenia. Hickman/Broviac-related staphylococcal infections, except for tunnel infection or thrombophlebitis, can usually be treated successfully without removing the catheter.

Adolescent↗
PubMed1980

Vancomycin therapy for serious staphylococcal infections in chronic hemodialysis patients.

Vancomycin therapy during 7 episodes of serious staphylococcal infections in chronic hemodialysis patients was monitored by a sensitive bioassay technique. One gm of vancomycin was given during dialysis at a mean dosage interval of 7 days for a mean duration of 48 days. Serum peak and trough vancomycin levels were monitored during therapy. Accumulation of vancomycin occurred in 1 patient on prolonged therapy; progressive rising through levels required a reduction in vancomycin dosage. Pre and post-dialysis vancomycin levels in one patient were unchanged. Vancomycin was effective in eradication of all staphylococcal infections and bacteremias. Three A-V shunt infections required surgical revision; 2 A-V fistula infections were salvaged with vancomycin therapy alone. We conclude that 1 gm vancomycin every 7 days is an effective regimen for serious staphylococcal infections in chronic hemodialysis patients. Monitoring of vancomycin levels insures maintenance of adequate levels and prevents toxic accumulation.

Aged↗
PubMed1982

[Protective action of a combined preparation and staphylococcal anatoxin in reproducing a local staphylococcal infection in white mice].

In experimental local staphylococcal infection in white mice, previously immunized with staphylococcal toxoid and the combined preparation (staphylococcal toxoid + protective somatic staphylococcal antigen), the advantage of the latter in protecting the animals against infection with Staphylococcus aureus belonging to different phage groups has been revealed. Immunization with the combined preparation, carried out in 2 injections, has been found to stimulate antimicrobial immunity, simultaneously with antitoxic one, which indicates the expediency of the further study of the combined preparation.

Animals↗
PubMedDate not supplied

Pharmacology and efficacy of vancomycin for staphylococcal infections in children.

Vancomycin is effective against most multiply resistant staphylococci, organisms that are becoming increasingly important in clinical medicine. Reported experience with vancomycin therapy in pediatric patients is limited. In this study vancomycin was administered intravenously to 33 patients whose ages ranged from one week to 16 years and who had suspected or proved infections caused by either Staphylococcus aureus or Staphylococcus epidermidis. The spectrum of staphylococcal infections included skin and soft-tissue infections and abscesses, osteomyelitis, pneumonia, shunt infections, endocarditis, and septicemia. All 29 patients with bacteriologically proved staphylococcal infections responded to vancomycin therapy. Peak and trough concentrations of vancomycin in serum produced satisfactory bacteriostatic and bactericidal titers against the infecting pathogens. In an anephric patient hemodialysis removed only negligible amounts of vancomycin. The amount of vancomycin that penetrated into ventricular fluid of 10 patients with shunt infections ranged from 7% to 37% (mean, 18%) of serum concentrations. One case of phlebitis and one case of transient elevation of serum levels of aspartate amino transferase were observed. No renal or otologic damage was detected in any patient. Adequate dilution of the drug, intravenous administration during 1 hr, and monitoring of the concentration in serum of patients undergoing long-term treatment and/or with impaired renal function minimize the likelihood of side effects. Vancomycin is an effective and safe agent for treatment of staphylococcal infections in pediatric patients.

Adolescent↗
PubMed2000

Should we routinely use mupirocin to prevent staphylococcal infections?

Routine use of mupirocin to prevent staphylococcal infections is controversial. We assessed attitudes and practices of healthcare professionals attending the Fourth Decennial International Conference on Nosocomial and Healthcare-Associated Infections regarding mupirocin prophylaxis. Eighty percent of participants did not use mupirocin routinely. At the end of the session, 58% indicated they would consider increased use of mupirocin.

Anti-Bacterial Agents↗