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Treatment of Vulvovaginitis VOLUME 43 : NUMBER 6 : DECEMBER 2020 ARTICLE Treatment of vulvovaginitis Cate Sheppard SUMMARY General practitioner, Northside Clinic, Fitzroy Vulvovaginitis is a commonly encountered problem in general practice. It usually presents with North, Victoria irritation and vaginal discharge. A thorough examination is essential in order not to miss the less common causes. Investigations Keywords may be needed to confirm the diagnosis. bacterial vaginosis, candidiasis, vulvovaginitis Candidiasis and bacterial vaginosis are the most common causes. Antifungals and antibiotics are therefore used in management. Aust Prescr 2020;43:195–9 Not all causes are infective. Several skin disorders can affect the vulva. https://doi.org/10.18773/ austprescr.2020.055 Ongoing or recurrent symptoms require careful evaluation and further investigation. Introduction The diagnosis of candidiasis is confirmed by microscopy Vulvovaginitis is a common presentation in general and culture of a high vaginal swab. The presence of practice. Most women will experience at least one budding yeast or hyphae on microscopy is diagnostic. episode in their lifetime.1 A microscopy-negative but culture-positive result does The symptoms of vulvovaginitis include discharge, not definitively diagnose candidiasis. This is because itch, pain, odour, dysuria and dyspareunia. An 10–20% of asymptomatic women will be culture positive. accurate diagnosis usually cannot be made on If symptoms are highly suggestive of candidiasis then the history alone. An examination is required and a positive culture may indicate infection. investigations may be needed. Treatment The causes can be infective or non-infective. While Candidiasis can be treated with antifungals given there are specific treatments, management also by the intravaginal or oral route.2 Over-the-counter includes education about genital skin care. preparations are available including combinations Infective causes containing a single dose of oral fluconazole 150 mg Most cases are caused by candidiasis or bacterial and an azole cream for external use. vaginosis. For the treatment of episodic vaginal candidiasis all regimens are at least 80% effective for clinical and Candidiasis mycological outcomes. Treatment guidelines vary Vulvovaginal candidiasis is usually due to Candida internationally. British guidelines list fluconazole albicans which is part of the normal vaginal 150 mg single dose and clotrimazole 500 mg cream microbiome of women of reproductive age. or pessary as first line while Australian guidelines This fungus requires an oestrogenised vaginal recommend vaginal clotrimazole. Cost and patient epithelium so it is seldom a cause of symptoms in preference3 usually determine the choice of treatment. postmenopausal women, unless they are taking Topical treatments are generally cheaper. hormone replacement therapy, or prepubertal girls. The choices for intravaginal treatment are: Risk factors for infection include diabetes, pregnancy, • clotrimazole – 1% vaginal cream or pessaries at recent antibiotics and prolonged corticosteroids. night for six nights Immunocompromised women are also at risk. • clotrimazole – 2% cream at night for three nights The usual symptoms are itch, with or without a discharge that is classically described as thick • clotrimazole – 10% cream for one night and white. Other symptoms include dysuria • nystatin vaginal cream 100,000 units for 14 nights and dyspareunia. or twice a day for one week. Examination typically reveals erythema and swelling Clotrimazole and nystatin can be used in pregnancy of the vulva sometimes with splits or fissures. The (category A). Relapses and inadequate resolution thick discharge is typically present around the of symptoms are more common with short- introitus and in the vagina. course treatment. © 2020 NPS MedicineWise Full text free online at nps.org.au/australian-prescriber 195 VOLUME 43 : NUMBER 6 : DECEMBER 2020 ARTICLE Treatment of vulvovaginitis Oral treatment: Bacterial vaginosis • fluconazole 150 mg can be given as a single dose. Bacterial vaginosis typically presents with malodorous This may be repeated in three days if symptoms (often fishy) vaginal discharge. The odour is more are severe. Fluconazole is a category D drug marked after intercourse. Discomfort is mild or in pregnancy. absent. Risk factors include new sexual partners and If vulval symptoms are particularly severe then vaginal douching. Bacterial vaginosis is more common a combination cream of hydrocortisone 1% with in women who have sex with women. Despite the clotrimazole may be applied externally twice a day in association with sexual activity it is not currently the first few days. recommended practice to treat the partners of women with bacterial vaginosis. Recurrent candida vulvovaginitis Bacterial vaginosis is a polymicrobial condition with Recurrent candida vulvovaginitis is defined as at least increased numbers of anaerobic organisms and a four microbiologically proven infections per year. It reduction in lactobacilli. Gardnerella is one of the can be difficult to prove as many women diagnose and principle anaerobes identified in bacterial vaginosis treat themselves, and many doctors do not examine but is not the only organism implicated. Recent or investigate to confirm the diagnosis.4 Any recurrent research has tried to determine potential triggers that vulval symptoms require examination and investigation. alter the vaginal microbiome, but no definitive factor It is unclear why about 5% of women are susceptible to has been identified. recurrent vulvovaginal candidiasis. Diabetes and other The diagnosis can be made when three out of four causes of immunosuppression should be excluded. Amsel’s criteria are present: Treatment • characteristic discharge – thin, greyish white, Treat recurrent infection with suppressive fluconazole adherent with or without initial intravaginal clotrimazole • clue cells on Gram stain of a high vaginal swab or nystatin. There are numerous regimens of • positive ‘whiff test’ – if the clinician can detect fluconazole in use internationally for recurrent genital malodour during examination candida vulvovaginitis. Commonly the fluconazole • vaginal pH more than 4.5. dose is 150 mg weekly for 2–3 months (some groups recommend up to six months), tapering down to Treatment fortnightly for two months, then monthly for two Symptomatic women, including pregnant women, months. It may be necessary to resume the weekly should be treated. Asymptomatic women undergoing regimen for longer should there be a recurrence while gynaecological instrumentation (e.g. IUD insertion, the dose is being tapered. hysteroscopy) should also be treated. Treating the Non-albicans candida vulvovaginitis male partners of women with bacterial vaginosis is currently not recommended. The female partners Non-albicans species in the vagina are often of women with bacterial vaginosis should be asymptomatic and for this reason the clinician should offered screening and treatment if positive, but take care to exclude other causes of symptoms, for there is currently no evidence that this reduces example eczema, before recommending treatment. recurrences. Treatment of asymptomatic bacterial The most common non-albicans form of infection is vaginosis in pregnancy has not been found to alter Candida glabrata. Azole resistance is common. pregnancy outcomes. Treatment Treatment may be oral or intravaginal. Studies The choices for intravaginal treatments are: comparing oral versus topical therapy suggest higher cure rates with seven days of oral • nystatin cream 100,000 units twice a day for two metronidazole, however this must be balanced weeks (pregnancy category A) against its higher rate of adverse effects.5 Cost may • boric acid pessaries 600 mg at night for two also be a factor as the topical therapies are not weeks (available from compounding pharmacies). subsidised by the Pharmaceutical Benefits Scheme. Prescribers should advise patients of the correct Single doses are associated with higher relapse and route of administration because boric acid is recurrence rates. poisonous if taken orally. It is contraindicated in pregnancy. The options for oral treatment are: Relapses may require longer treatment courses • metronidazole 400 mg twice a day for five to and then twice-weekly maintenance therapy for seven days or 2 g single dose three months. • clindamycin 300 mg twice a day for seven days. 196 Full text free online at nps.org.au/australian-prescriber VOLUME 43 : NUMBER 6 : DECEMBER 2020 ARTICLE The options for intravaginal treatment are: In severe initial cases it may be appropriate to • metronidazole gel 0.75% at night for five days continue treatment with antivirals for up to 10 days. • clindamycin 2% cream at night for seven days. Subsequent therapy Metronidazole can cause nausea and should be taken For subsequent infections the recommended with food. Alcohol should not be consumed with treatment has usually been for five days: these drugs. • valaciclovir 500 mg twice a day for five days For pregnant women clindamycin is category A. • famciclovir 125 mg twice a day for five days. Metronidazole is in category B2 for pregnancy, but There are a number of alternative short-course has not been proven to be harmful. regimens that are considered to be equally effective: Recurrent bacterial vaginosis • famciclovir 500 mg single dose then 250 mg Up to 50% of women will have a recurrence within 12-hourly for three doses one year. As yet, there are no definitive treatments • famciclovir 1000 mg
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