Search PubMed⌕ Search

SEARCH · Search PubMed

Results for “Natamycin”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 37 records · Page 2Linked to original sources
PubMed1998

Randomised trial of 0.2% chlorhexidine gluconate and 2.5% natamycin for fungal keratitis in Bangladesh.

AIM: The management of suppurative keratitis due to filamentous fungi presents severe problems in tropical countries. The aim was to demonstrate the efficacy of chlorhexidine 0.2% drops as an inexpensive antimicrobial agent, which could be widely distributed for fungal keratitis. METHODS: Successive patients presenting to the Chittagong Eye Institute and Training Complex with corneal ulcers were admitted to the trial when fungal hyphae had been seen on microscopy. They were randomised to drop treatment with chlorhexidine gluconate 0.2% or the standard local treatment natamycin 2.5%. The diameters, depths, and other features of the ulcers were measured and photographed at regular intervals. The outcome measures were healing at 21 days and presence or absence of toxicity. If there was not a favourable response at 5 days, "treatment failure" was recorded and the treatment was changed to one or more of three options, which included econazole 1% in the latter part of the trial. RESULTS: 71 patients were recruited to the trial, of which 35 were randomised to chlorhexidine and 36 to natamycin. One allocated to natamycin grew bacteria and therefore was excluded from the analysis. None of the severe ulcers was fully healed at 21 days of treatment, but three of those allocated to chlorhexidine eventually healed in times up to 60 days. Of the nonsevere ulcers, 66.7% were healed at 21 days with chlorhexidine and 36.0% with natamycin, a relative efficacy (RE) of 1.85 (CL 1.01-3.39, p = 0.04). If those ulcers were excluded where fungi were seen in the scraping but did not grow on culture, the estimated efficacy ratio does not change but becomes less precise because of smaller numbers. Equal numbers of Aspergillus (22) and Fusarium (22) were grown. The Aspergillus were the most resistant to either primary treatment. CONCLUSIONS: Chlorhexidine may have potential as an inexpensive topical agent for fungal keratitis and warrants further assessment as a first line treatment in situations where microbiological facilities and a range of antifungal agents are not available.

Adolescent↗
PubMed2003

Comparative study of a semisynthetic derivative of natamycin and the parent antibiotic on the spoilage of shredded cheddar cheese.

A water-soluble N-alkyl semisynthetic derivative of natamycin was synthesized by the Michael addition reaction of the parent with an N-substituted malemide. A comparative study was carried out to investigate the effectiveness of the semisynthetic derivative and the parent antibiotic in suppressing mold growth on shredded Cheddar cheese stored in modified atmosphere packaging (MAP). The effects of 0-, 10-, and 20-ppm antimycotic treatments were examined. A 20-ppm natamycin treatment effectively suppressed visible mold growth (< 10(4) CFU/g) in MAP samples for up to 30 days after packages were opened. The performance of the 20-ppm semisynthetic derivative was similar to that of the 10-ppm natamycin treatment. For these treatments, visible mold growth did not occur in MAP samples until 20 days after packages were opened. These results indicate that the semisynthetic derivative of natamycin is less effective than the parent compound in suppressing mold growth on shredded Cheddar cheese.

Antifungal Agents↗
PubMed1987

Correlation of in vitro and in vivo susceptibility of Candida albicans to amphotericin B and natamycin.

The efficacy of topical 0.15% amphotericin B and 5% natamycin was examined in a model of Candida keratitis in rabbits and correlated with three tests of in vitro susceptibility: tube dilution minimal inhibitory concentration (MIC), minimal fungicidal concentration (MFC) and agar diffusion zones of inhibition. For a panel of 17 strains, the MIC classified precisely the same strains as resistant or susceptible to amphotericin B as did the in vivo response. Several strains were misclassified using the MFC and the zone of inhibition. For natamycin the MIC misclassified two strains but it was still superior to the other two tests. For all strains, amphotericin B was equal or superior in efficacy to natamycin in vivo. The tube dilution MIC for amphotericin B was a reliable indicator for natamycin efficacy in vivo.

Amphotericin B↗
PubMed2000

Cytotoxicity in pig hepatocytes induced by 8-quinolinol, chloramine-T and natamycin.

The potential cytotoxic effects of the compounds 8-quinolinol, chloramine-T and natamycin have been studied in isolated pig hepatocytes. The relative cytotoxicity of these compounds was evaluated on the basis of the leakage of cytosolic lactate dehydrogenase (LDH), 3-(4,5 dimethyl)thiazol-2-yl,-2,5-diphenyl tetrazolium bromide (MTT) reduction by mitochondrial dehydrogenases, uptake of neutral red (NR) by cytosolic lysosomes, glutathion (GSH) depletion and oxidized glutathion (GSSG) efflux after 24 h exposure. Evaluation of the 20%, 50% and 80% reduced absorbance data obtained from the parameters NR20, NR50, and NR80, and MTT20, MTT50 and MTT80 enabled us to rank these compounds in decreasing order of cytotoxicity: 8-quinolinol > natamycin > chloramine-T. Also for the parameters LDH and GSH, chloramine-T appears to be less cytotoxic than natamycin and 8-quinolinol. Our study demonstrated that pig hepatocytes may be a useful model for examining cytotoxic events of drugs to be used in pigs, therefore avoiding possible extrapolation problems due to species differences.

Animals↗
PubMed2004

Fungal keratitis caused by Scopulariopsis brevicaulis treated successfully with natamycin.

PURPOSE: To report a severe case of keratitis caused by Scopulariopsis brevicaulis and its response to treatment with natamycin. METHODS: A 28-year-old farmer suffered a corneal perforation with a piece of wire in the right eye. Two months later, he developed severe infectious keratitis in that eye. RESULTS: S. brevicaulis was cultured from the patient's cornea on Sabouraud agar. The keratitis responded to treatment with topical natamycin 5%. A debridement of the corneal ulcer was also performed. CONCLUSIONS: S. brevicaulis is a rare cause of fungal keratitis. The infection can be difficult to eradicate. This is the first case report of keratitis caused by S. brevicaulis treated successfully with natamycin.

Adult↗
PubMed1989

A controlled trial of house dust mite eradication using natamycin in homes of patients with atopic dermatitis: effect on clinical status and mite populations.

In a controlled clinical trial, patients with atopic dermatitis carried out house dust mite eradication procedures on their mattresses, using natamycin or a matched placebo spray, with or without vacuum cleaning, for 4 months. For the two groups that used vacuum cleaning, mite numbers fell significantly both by comparison of mean initial and final numbers and by calculating mean rates of reduction from regression analyses (P less than 0.01 in all cases). There were no differences between the groups in the magnitude of the decreases. For the two groups that did not use vacuum cleaning, mite populations remained virtually unchanged. These results indicate vacuum cleaning not natamycin had the major effect on mite eradication. Mean symptom scores of patients in all four groups were slightly reduced by the end of the trial, but there was a greater reduction rate (P less than 0.01) in the combined scores of the groups that did not use vacuum cleaning, demonstrating a lack of correlation between improvement in clinical score and lowered mite numbers. No patients entered remission and the maximum improvement in clinical score was only 47%. Natamycin and vacuum cleaning neither alone nor in combination proved valuable in reducing mite numbers sufficiently to provide clinical benefit.

Adolescent↗
PubMed2003

A randomised clinical trial comparing 2% econazole and 5% natamycin for the treatment of fungal keratitis.

AIM: To compare 2% econazole and 5% natamycin in the management of fungal keratitis. METHODS: A randomised clinical trial was performed using 2% econazole or 5% natamycin as the two treatment arms on patients presenting with culture positive fungal keratitis to the cornea service at Aravind Eye Care System, Madurai, India. RESULTS: 116 patients were recruited, and 112 continued in the study. There were no significant differences between the two arms at baseline or for success (defined as a healed or healing ulcer) at final visit (p = 0.79). CONCLUSIONS: 2% Econazole appears to be as effective as 5% natamycin for the management of fungal keratitis.

Adolescent↗
PubMed1986

Corneal penetration of topical amphotericin B and natamycin.

The corneal uptake and penetration of 14C-labelled 0.15% amphotericin B and 5% natamycin were studied in Dutch-belted rabbits. Corneal levels of natamycin were substantially higher than amphotericin B. For both drugs, these levels were influenced by corneal contact time. In corneas debrided of epithelium, both agents entered the corneal stroma and levels were detected in aqueous in the therapeutic range. However, in corneas with intact epithelium, penetration was negligible for amphotericin B (0.23 microgram/gm at 2 mins). By contrast, although penetration of natamycin was greatly reduced, 7.0 micrograms/gm were present at 2 mins.

Administration, Topical↗
PubMed2006

Growth of Mycobacterium avium subsp. paratuberculosis in the presence of hexadecylpyridinium chloride, natamycin, and vancomycin.

A design-of-experiments approach was used to examine the effect of hexadecylpyridinium chloride (HPC), alone or in combination with the antibiotics vancomycin and natamycin, on the growth of Mycobacterium avium subsp. paratuberculosis (MAP). At concentrations above 74.4 microg/ml, HPC had a highly significant detrimental effect on the growth of MAP, whereas natamycin at 10.8 and 21.6 microg/ml and vancomycin at 5.2 and 10.4 microg/ml did not have such an effect. Titration of the amount of HPC tolerated by MAP indicated that growth can occur in the presence of 24.8 microg/ml or lower. Processing of bovine fecal specimens indicated that reducing the concentration of HPC from 32.22 to 1.07 mg/ml during decontamination may improve detection when cultures are grown on solid medium but not when cultures are grown in liquid medium. Further investigation into optimizing HPC concentration during processing of fecal samples is warranted. Natamycin, in conjunction with vancomycin, may be useful for controlling fungal contamination during isolation of MAP from fecal samples.

Animals↗
PubMedDate not supplied

Rapid ultraviolet spectrophotometric and liquid chromatographic methods for the determination of natamycin in lactoserum matrix.

Two rapid and simple methods were developed for the determination of natamycin in lactoserum matrix by ultraviolet (UV) spectrophotometry and liquid chromatography (LC) with diode-array detection. The methods involve protein precipitation with methanol, followed by centrifugation. No cleanup is necessary. The applicable concentrations of natamycin in lactoserum range from 2 to 500 mg/L for samples analyzed by both methods. The detection and quantitation limits are 0.07 and 0.23 mg/L, respectively, for the UV spectrophotometric method and 0.1 and 0.32 mg/L, respectively, for the LC method. The methods were applied satisfactorily to the determination of natamycin in various commercial lactosera. Both methods were validated independently by standard additions and Youden methodologies, which verified their accuracy. Once the 2 proposed methods were validated independently, the validation of one method was carried out with the other.

Antifungal Agents↗
PubMed2005

Electrochemical study of natamycin--analytical application to pharmaceutical dosage forms by differential pulse voltammetry.

The electrochemical oxidation and determination of natamycin has been carried out at a carbon paste electrode in aqueous solutions in the pH range of 2.5-10.30 by cyclic and differential pulse voltammetry. Best results were obtained with the differential pulse voltammetric technique in 0.5 M sulfuric acid at pH 1.82. The diffusion controlled nature of the waves was established. A differential pulse voltammetric technique for the determination of natamycin 0.5 M sulfuric acid which allows quantitation over the range of 2 x 10(-6)-8 x 10(-5) M range method is proposed. Limit of detection and limit of quantitatification were 1.5 x 10(-6) and 5 x 10(-6) M, respectively. Based on this study a simple, rapid, selective and sensitive voltammetric method was developed for the determination of natamycin in capsules. In order to validate the proposed method, UV spectroscopy was applied.

Antifungal Agents↗
PubMed1997

[Determination of natamycin residues in ripening cheeses by high-performance liquid chromatography].

The purpose of the study was to determine the usefulness of high performance liquid chromatography (HPLC) for natamycin determination in routine control of ripening cheeses. In the method the antibiotic is extracted from the studied sample with a 2:1 methanol/water solution, freezing of contaminants at -18 degrees C and determination of HPLC using a RP C8 column and UV detection. In case of low concentrations of the antibiotic the extract was condensed by extraction to solid phase (SPE). In the study of the fortified samples the basic analytical parameters of the method were tested (determinability, repeatability, recovery) and its usefulness in the 0.05-0.4 mg/kg concentration range (by SPE) and above 0.5 mg/kg of cheese was checked. Recovery was from 87 to 98%, repeatability was 1.3-7.3% and determinability was 0.5 mg/kg (using SPE 0.05 mg/kg). The obtained results demonstrated a good usefulness of HPLC for routine control of natamycin content in ripening cheeses. It seems recommendable to apply HPLC for natamycin determination in ripening cheese by sanitary-epidemiological stations.

Antifungal Agents↗
PubMed2000

Optimization of the cultivation medium for natamycin production by Streptomyces natalensis.

The effects of certain nutrients on natamycin production by Streptomyces natalensis in submerged batch culture were studied. The production of this antibiotic required glucose in the cultivation medium with a concentration of 20 g/l. On the other hand, the highest antibiotic production was obtained in a cultivation medium containing 0.05 g/l of potassium dihydrogen phosphate. Further increase in phosphate concentration resulted in a significant increase in biomass concomitant with lower antibiotic production. Among different N-sources tested, only ammonium sulphate, sodium nitrate and beef extract were the suitable nitrogen sources in supporting the antibiotic production. Furthermore, a mixture of beef extract and yeast extract (8 g/l and 2 g/l, respectively) exhibited a synergistic effect in enhancing the natamycin production reaching about 1.5 g/l.

Carbon↗
PubMed1988

Optimal efficacy of a fungicide preparation, natamycin, in the control of the house-dust mite, Dermatophagoides pteronyssinus.

The efficacy of a fungicidal preparation, natamycin, for the effective control of Dermatophagoides pteronyssinus (Trouessart), was determined at different concentrations on mattress-dust microsites, including ticking. One treatment with the commercially available natamycin concentration (Tymasil) resulted in a 65% reduction of house-dust mite populations within 4 weeks of treatment. The acaricidal control could be proven despite the protective role of mattress fibres such as ticking. However, mite fecundity was much more affected after treatment with twice the commercial concentration, which then assured a long-term control. Concentrations below the commercially available one were not effective. In a maritime climate, six sequential treatments three times a year would be effective for an adequate long-term control because of the high growth of house-dust fungi and the close interaction between the mite and the mould Aspergillus penicilloides.

Animals↗
PubMed1975

Natamycin in genital candidosis in men.

In a trial of natamycin, an antifungal antibiotic in a vanishing cream base, assessment was possible in 66 men with genital or anal candidosis. The overall cure rate was 82 percent, In 43 patients with culturally proven candidosis it was 98 percent. but in 23 patients treated solely on clinical impression it was only 52 percent. Symptoms were rapidly relieved in those who responded and there were no side-effects. In our hands, natamycin 2 per cent cream has proved to be a valuable preparation in the treatment of candidal balanitis.

Administration, Topical↗
PubMed1982

Treatment of vaginal candidosis with natamycin and effect of treating the partner at the same time.

Thirty-three patients with vaginal candidosis were treated with natamycin vaginal tablets for 10 days and their partners were treated double-blind with natamycin cream/placebo cream. Follow-up examinations were carried out one week after the treatment was discontinued and again about one month later. The cure rate in patients having actively treated partners was 94%, not differing significantly from the cure rate of 88% in patients whose partners had been treated with placebo. One month after the treatment there was a high recurrence/re-infection rate, about 30% in both groups. Thus, treating the partners of patients with vaginal candidosis has no influence upon the therapeutic outcome or recurrence rate. The recurrence is presumably due to re-infection from the patient herself.

Adult↗
PubMed1975

[Therapeutic results achieved through the advantage of a combination of oral metronidazole and vaginal natamycin tablets in urogenital protozoan, trichobacterial and blastomyces infections].

Vaginal inflammations caused by Trichomonas, Leptothrix vaginalis or Candida and other less common organisms respectively, were treated very successfully with a combination of metronidazole orally and a natamycin preparation vaginally (Pimafucin vaginal tablets). In women with urogenital Trichomoniasis a cure was obtained in 96,1% of the cases (microbiologically controlled); Candida mycoses of the vagina were cured clinically in 89% of the cases after the first course of treatment and mycologically in 79% of the cases. Of special importance is the rapid and successful elimination of the mixed infection before birth, because this diminishes perinatal morbidity of the fetus. The combination treatment of bilateral, constantly interchanging Candida and Trichomonas infections of the vagina is of importance to both sexes, especially with respect to the elimination of sterility. From the onco-gynecological point of view the combination treatment with metronidazole and natamycin appeared to be of value as it limits the incidence of dyskariosis of the epithelial cells, which occur frequently in cases of inflammation of the vagina or cervix uteri. No teratogenic effect was observed with this combination when applied during pregnancy.

Administration, Oral↗
PubMed1976

[Natamycin-S treatment of ringworm in cattle. Epidemiological aspects (author's transl)].

At a test centre for bulls the progress of a ringworm infection was studied. By treating only the affected animals with natamycin-S the progress of the disease as well as the spreading of the infection among untreated animals could be studied. By treating only the affected animals with natamycin-S the progress of the disease as well as information could be gathered on the difference of progress of the infection in both groups and also of the role of possible immunity.

Animals↗