[INVESTIGATION ON ANTIFUNGAL SUSCEPTIBILITY OF CANDIDA YEASTS IN PREGNANT PATIENTS WITH CONFIRMED VULVOVAGINAL CANDIDIASIS AND THEIR NEWBORNS.
Background Vulvovaginal candidiasis (VVU) is considered as a special risk factor during pregnancy, with important influence on the reproductive function of the patients and on the morbidity in the newborns from mothers with VVC. Maternal VVC is a major risk factor for the development of candida colonization of the infant, which in turn is the first step towards the development of mucocutaneous or systemic candidiasis and Candida septicemia in the newborn. In pregnant patients, the possible applicable local and systemic medications are limited, while the therapeutic resistance in chronic recurrent forms of VVC increases, facts that require precision of the diagnosic approach to optimize the therapeutic recommendations in pregnant patients, considered as a high risk group. The aim of this study was to investigate in vitro antifungal susceptibility of Candida yeasts to current antifungal agents in pregnant patients with confirmed VVC before the act of birth. Material and Methods Vaginal secretions of 23 healthy pregnant women with proven Candida vaginitis were taken within 48 hours before birth and the presence of yeasls of Candida was confirmed by culture examination. Between 47 72 hours after birth, samples were taken for Candida colonization of the oralmucosa and feces of their newborns. Samples were plated on Sabouraud agar and cultured in an incubator for 2 to 3 days at a temperature of 25deg C. Species identification of the isolated yeasts were performed by commercial API Candida test API 20C AUX (BioMerieux, Marcy l'Etoile, France) Part of the isolates was identified by commercial whale AUXACOLOR (BioRad, Mames la Coquette, France) Antifungal sensitivity of isolated strains was examined by applying commercial solicitation ready kit and methods of disc diffusion and E test, as the aim of the authors was to assess their potential for use in the diagnosis, and the correlation between them. Results Candida albicans was the prevalent etiological agent in pregnant patients with VVC immediately before birth (n 22, 91.67 0.06% Positive Candida colonization was detected in 14 (58.33% of their newborns (n 24) as no statistically significant difference was established, depending on the mode of delivery. The investigated antifungal susceptibility with test Fungifast (ELITech Microbiology Reagents) found 100% sensitivity of Candida albicans to Amphotericin B, Flucytosin and Voriconazole. Intermediate susceptibility to Itraconazole was found in 6 of 23 (26% maternal isolates, and 5 of 23 (22% isolates were moderately sensitive to Fluconazole. Candida krusei showed complete resistance to Fluconazole and Itraconazole. Within the group of antifungals for topical application (Econazole, Ketoconazole, Miconazole, Nystatin) the results established that 100% of the studied fungi were sensitive to Nystatin, while within the groups of azoles for vaginal and topical use C.krusei was 100% resistant, as the sensitivity of C. albicans varied between 60 80% Conclusion Our recommendation, based on the esablished results is that in pregnant with uncomplicated VVC as a first line therapy should be considered the group of vaginal azoles and Nystatin, while the systemic therapy should be considered carefully and only after the firSt trimester. In cases of oral and intestinal candidiasis in neonatology, we recommend a therapy with minimal absorbable antifungals as Nystatin and miconazole (amphotericin B is available in our country) while systemic antifungal should be initiated only as a second choice. The exact etiological diagnosis is especially important because in our country there is a tendency for increased incidence of non albicans fungus resistant to therapy, and that changes the therapeutic behavior.
Akusherstvo i ginekologiia