Eylem Seç
Studies of fungi pathogenic for man and animals - Antibiotic production by dermatophytes
Başlık:
Studies of fungi pathogenic for man and animals - Antibiotic production by dermatophytes
Yazar:
Ibrahim, Darah, author.
ISBN:
9780438052888
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (163 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 76-08C.
Advisors: J. C. Gentles.
Özet:
An investigation made into antibiotic production by dermatophytes, revealed that glucose peptone agar (GPA) is a suitable growth medium and that it is also a satisfactory medium for use in demonstrating the effect of the antibiotics produced against susceptible bacteria. It was also found that the use of a simple agar-disc/diffusion method gave consistent results. Neither the anatomical site from which they were isolated, nor the duration or method of conservation in culture affected the ability of dermatophytes to produce antibiotics. Similarly, there was no significant variation of results, irrespective of the source of the species or strains of the bacteria. The spectrum of antibiotic activity detected conformed to the reports of various investigators who had analysed the metabolic products of dermatophytes and indicated that the principal antibiotics produced are penicillin(s), and either a streptomycin-like substance or fucidic acid or both. A very similar spectrum of activity was found in most of the species investigated. However, the pattern of activity varied with the stage or the age of growth and was consistent for the species. As a result, the varying time-pattern provides a method of differentiating between certain species, such as T. rubrum and T. mentagrophytes var interdigitale, or T. erinacei and T. equinum, which may be difficult to identify exactly by their morphological characteristics alone. As expected, factors affect the growth of the dermatophytes also affect antibiotic production. Inhibition of growth by incorporation of antifungals in the medium, caused a reduction in the level of antibiotic production but apparently did not affect the pattern of activity. However, inhibition of growth by incubation at 37°C, resulted in a change in the pattern of activity. For the three species of dermatophytes investigated at this incubation temperature, there was a reduced and equal level of production of antibiotics with penicillin activity and a loss of activity against penicillin-resistant organisms, when compared with growth at 28°C. Isolations of dermatophytes and bacteria were made from a number of patients attending a dermatological clinic for suspected foot ringworm. The bacterial flora did not vary irrespective of whether or not the patients had a dermatophyte infection, nor according to the infecting dermatophyte (most infections were caused by T. rubrum). Neither did the flora vary as a result of treatment of the dermatophyte infected patients with two different systemically administered antifungal drugs (ketoconazole and griseofulvin). None of the bacterial isolates was resistant to penicillin.
Notlar:
School code: 0547
Konu Başlığı:
Tüzel Kişi Ek Girişi:
Mevcut:*
Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(684434.1) | 684434-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
On Order
Liste seç
Bunu varsayılan liste yap.
Öğeler başarıyla eklendi
Öğeler eklenirken hata oldu. Lütfen tekrar deneyiniz.
:
Select An Item
Data usage warning: You will receive one text message for each title you selected.
Standard text messaging rates apply.