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Biomedical subjects

M Gobernado

Publications and source records attributed to M Gobernado.

At least 127 records · Page 7Linked to original sources
PubMed1977

Enteropathogenic E. coli gastroenterocolitis in neonates treated with fosfomycin.

The effect of calcium salt of fosfomycin in the treatment of 43 neonates suffering from acute gastroenterocolitis produced by enteropathogenic E. coli is evaluated. The minimal inhibitory concentration of these E. coli was, generally, lower than 128 mug/ml. Dosages of 150-200 mg/kg body weight/day were administered orally every 8 h. This treatment lasted for 4 days only. Clinical evolution was favorable in 38 (88%) babies and bacteriological evolution in 30 (70%). In eight cases a different flora to the initial was selected during the treatment with fosfomycin. None of the cases treated showed any toxic alteration attributed to the antibiotic.

Acute Disease↗
PubMed1977

Fosfomycin in treatment of respiratory bacterial infections.

A study was made of 40 patients suffering from clinically and bacteriologically demonstrated bacterial respiratory infections which were all treated with fosfomycin as the only antibiotic. Studies were made of the sensitivity of the isolated organisms and control of the eradicated and selected organisms. Analytical controls were performed on all patients before, during and after treatment. The average dose employed was 60 mg/kg/day, divided into four doses and administered parenterally. The duration of the treatment fluctuated between 6 and 11 days in 87% of the cases. A clinical and bacteriological evaluation was made of the results. The clinical response was satisfactory in 75% of the cases, partial in 7.5% and poor in 17.5%. The bacteriological evolution was satisfactory in 62.5%, partial in 12.5% and poor in 20%. It was not possible to control the evolution in 15% of the patients. The concentrations of the antibiotic were determined in the sputum of 6 patients and fluctuated between 0.6 and 12.9 mug/ml. In no case could any significant disorders be attributed to the antibiotic.

Adolescent↗
PubMed1975

Fosfomycin in treatment of chronic urinary tract infection.

A study was made of fosfomycin in the treatment of chronic urinary infection in 51 patients. 72% of the 67 bacteria isolated and tested in the laboratory with discs containing 50 mug of fosfomycin were found to be sensitive to the antibiotic. The majority of E. coli, Klebsiella, P. mirabilis and Ps. aeruginosa strains were sensitive to the antibiotic. Generally, 60 mg of fosfomycin/kgbody weight was administered intramuscularly 6-hourly for 7-15 days. A clinical and bacteriological cure was obtained in 39 patients (76%), and after 4-6 weeks in 31 patients (61%). Blood and urine fosfomycin levels were determined in seven patients, three with normal renal function, three with moderate renal insufficiency, and one with severe renal insufficiency. The antibiotic levels and elimination time maintained a clear relation with the degree of renal insufficiency.

Adolescent↗
PubMedDate not supplied

Killing of gram-negative bacteria by ciprofloxacin within both healthy human neutrophils and neutrophils with inactivated O2-dependent bactericidal mechanisms.

The intraphagocytic killing of Escherichia coli, Serratia marcescens, Pseudomonas aeruginosa, and Salmonella typhi by ciprofloxacin (0.1, 1 and 5 microg/ml) within human neutrophils with intact and impaired (by phenylbutazone treatment) O2-dependent killing mechanisms was studied and compared with the extracellular killing in the same medium of the intraphagocytic killing, but omitting neutrophils. The MIC/MBC of ciprofloxacin in vitro (assays performed according to NCCLS specifications) were: 0.015/0.06 for E. coli, 0.12/32 for S. marcescens, 1/16 for P. aeruginosa, and 0.007/0.06 for S. typhi. Ciprofloxacin showed bactericidal activity both extracellular and within phenylbutazone-treated and untreated neutrophils. The minimum concentration of ciprofloxacin to kill 90% of phagocytosed bacteria within neutrophils with normal O2-dependent killing power after 30 min was: 0.1 microg/ml for E. coli, and S. typhi, 1 microg/ml for P. aeruginosa, and 5 microg/ml for S. marcescens. In contrast, exposure for 60 min was required to reach this percentage within phenylbutazone treated neutrophils. The minimum concentration to kill 90% of extracellular bacteria after 30 min was: 0.1 microg/ml for E. coli, P. aeruginosa and S. typhi, and 5 microg/ml, for S. marcescens. A positive interaction between ciprofloxacin and the O2-dependent mechanisms of phagocytes was found. The reactive oxygen metabolites produced in the respiratory burst did not affect the intraphagocytic activity of ciprofloxacin. Phenylbutazone treatment of phagocytes would be a good experimental model to study the intraphagocytic killing of drugs in situations such as AIDS and chronic granulomatous disease where inefficient oxidative mechanisms of neutrophils exist.

Anti-Infective Agents↗
PubMedDate not supplied

[Molecular typing and sensitivity of Candida albicans isolates proceeding from critically ill patients].

BACKGROUND: Nosocomial infection due Candida albicans in immunocompromised patients are recognized as a significant cause of morbidity and mortality. The endogenous forms of infections may require effective strategies for prevention which are different from those for exogenous infections due to transmission of any organism from patient to patient. Typing by PCR of isolates of C. albicans maybe useful for that. METHODS: Twenty-four isolates in blood cultures of 24 critically ill patients were studied. Typing by interrepeat PCR and in vitro antifungal susceptibility tests was performed by a microdilution. RESULTS: Twenty-one different genotypes were obtained. The isolates with same genotype shown different patterns of susceptibility. With one strain a band pattern very different from that obtained with the remaining isolates. CONCLUSIONS: No were relation between strain of same unit. The isolates with same genotype was different critically unit or year of isolation.

Antifungal Agents↗
PubMedDate not supplied

[Aeromonas spp. isolated from human feces. Species and pathogenicity factors].

The role of Aeromonas genus as a primary intestinal pathogen is still a matter of controversy. We have studied the isolation of Aeromonas spp. from human stools samples, looking for the production of pathogenic factors and its relationship with different species. From a total of 471 strains isolated, 241 were A. caviae, 127 A. sobria, 89 A. hydrophila and 14 non-typable strains. The pathogenic factors production was studied in a bacteria-free filtrate from a 18 hours trypticase-soy broth culture. Enterotoxin production was assessed by suckling-mice test, cytotoxin production by using Hela cells monolayer and hemolysin production by double dilution from the filtrate, plated in microdilution plates, against rabbit red-blood cells. Enterotoxin production test was positive for A. sobria, A. hydrophila and A. caviae in 81.1%, 62.9% and 7.0% of strains respectively. Cytotoxin production was also positive for these species in 96.6%, 76.4% and 4.1%, and hemolysin production was positive in 95.3%, 70.7% and 2.4% of the strains respectively.

Aeromonas↗
PubMedDate not supplied

[Salmonella: resistance to 3 antibiotics of choice].

The resistances of 1,156 stocks of Salmonella isolated between 1980-1981 were compared with the 1,528 stocks of Salmonella obtained between 1986-1987 against three elective antibiotics such as ampicillin, chloramphenicol, and cotrimoxazole. The number of resistant stocks and the resistances to the above antibiotics are increasing (9.7% during the first period and 13.6% during the second, p = 0.002). Resistances to multiple agents increased from 1.8% to 4.38% (p = 0.0006). During the period of 1986-1987 there were stocks resistant to the three studied antibiotics.

Ampicillin↗
PubMedDate not supplied

[Monobactams].

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Humans↗