The pill does not cause 'thrush'.
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OBJECTIVE: It was hypothesised that the endometrium might act as a reservoir for candida, thus infecting the vagina as the endometrium is shed during menstruation. DESIGN: A prospective study of women with recurrent vulvo-vaginal candidiasis. The endometrium was sampled and cultured for candida species. SETTING: Central London STD clinic. SUBJECTS: 26 women were enrolled, of whom 20 completed the study. RESULTS: One patient had a positive endometrial culture for candida species, the isolate being Candida krusei. CONCLUSIONS: The endometrium is not a common resevoir for candida species and therefore, infection at this site is an unlikely cause of recurrent vaginal candidiasis.
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Bacterial vaginosis (BV) is the most common cause of vaginal discharge in women of childbearing age. In some women it shows a relapsing and remitting course with apparently spontaneous onset and resolution. There are intermediate patterns of vaginal flora in which lactobacilli and other species co-exist. We asked women with recurrent BV to prepare vaginal smears daily, and to record symptoms, time of menstruation, sexual activity and use of douches or medication. We Gram-stained the smears and assigned a Nugent score for BV, and noted the presence of candida, pus cells, sperm and blood. Eighteen women collected daily vaginal smears for up to 10 months. Forty months of slides were collected in total. Bacterial vaginosis arose spontaneously on 23 occasions. We saw candida arise 11 times. Bacterial vaginosis appeared after candida on 9 of these 11 episodes. We saw BV regress spontaneously 13 times. Nine of these resolutions occurred within 48 h of unprotected sexual intercourse: BV only arose on one occasion within 48 h of unprotected intercourse. The intermediate pattern was seen for up to 10 days, and occurred as BV began or resolved in some women, and sometimes resolved without developing into BV. Bacterial vaginosis arose most often in the first 7 days of a menstrual cycle, and resolved spontaneously most often in mid-cycle. In women with recurrent BV, BV arises most often around the time of menstruation and resolves spontaneously in mid-cycle. Recurrences often follow an episode of candidiasis, and BV often regresses after unprotected sexual intercourse.
The Sindbis virus uses birds as vertebrate hosts in the summer amplification cycle, and the virus is transmitted by ornithophilic Culex species. Previous field and experimental studies have shown that mainly passerine birds are involved in the amplification. To delineate the pattern of Sindbis virus infections among passerines, we collected and sampled birds for blood at five study sites located in northern, central, and southern Sweden. All study sites were lowland forested wetlands and humid forests. The blood samples were assayed for Sindbis neutralizing antibodies, and we tested if the prevalence of Sindbis antibodies varied in relation to bird characteristics (i.e., species, body-mass, sex, and age), and environmental factors (i.e., year, month, and location). We found that Sindbis virus infections occurred in almost all passerine species sampled, but that the infection prevalence was unequally distributed among species. The fieldfare, the redwing, and the songthrush each had significantly higher prevalence than the average for all species. Large passerine species had higher infection prevalence than small species. The infection was less prevalent in hatching-year birds than in older birds during June and July, but not in August. Males and females had the same infection prevalence. The prevalence of Sindbis antibodies was higher in central than in southern Sweden, which coincided with a higher proportion of fieldfare-redwing-songthrush samples in the central region of the country. Thus, it is possible that regional and annual variations in the prevalence of Sindbis antibodies in Swedish passerine species depend on the number of fieldfares, redwings, and songthrushes available for feeding by vector mosquitoes.
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