Gynaecological Infections

Chapter 7 Gynaecological Infections



Inflammation in the Lower Gynaecological Tract 132
Defence Mechanisms 132

Vulval Inflammation 133
Treatment 133

Vaginal Discharge and Infection 134
Composition 134

Source of Vaginal Discharge 134

Clinical Features 134

Complaints of Vaginal Discharge 135
Examination 135

Leucorrhoea 135

Vaginal Discharge 136
Candida Albicans 136

Bacterial Vaginosis 137

Trichomonas Vaginalis 137

Vaginitis 139
Atrophic Vaginitis 139

Vulvovaginitis in Children 139

Foreign Bodies 139

Other Causes of Vaginitis 139

Genital Herpes 140
Clinical Findings 140

Diagnosis 140

Treatment 140

Genital Warts 141
Clinical Findings 141

Differential Diagnosis 141

Histology 141

Treatment 141

Bacterial Infections 142
Chlamydia Trachomatis 142

Tropical Sexually Transmitted Infections 143
Lymphogranuloma Venereum (LGV) 143

Granuloma Inguinale 143

Chancroid 143

Gonorrhoea 144
Clinical Features 144

Examination 144

Treatment 144

Sexual Partners 144

Syphilis 145
Primary Syphilis 145

Diagnosis of Syphilis 146

Signs and Symptoms of Syphilis 147

Toxic Shock Syndrome 147

Physiological Variation of the Cervix 148
Cervical Ectopy 148

Pelvic Inflammatory Disease 149
Acute PID 149

Bacteriology 149

Differential Diagnosis 149

Management 149

Chronic PID 150

Genital Tuberculosis 151
Clinical Features 151

Diagnosis 151

Pathology 151

Treatment 152

Human Immunodeficiency Virus 153
Transmission 153

Acquired Immune Deficiency Syndrome (AIDS) 153

Intercurrent Infections Frequently Found in AIDS Patients 154

Paediatric AIDS 154

Treatment 154

Antiretroviral Drugs are the Mainstay of Treatment 154


Inflammation in the lower gynaecological tract


Under normal conditions, the vulva, vagina and ectocervix are the habitat of various types of infective agents, but they are a threat only if normal defence mechanisms are altered.



Defence mechanisms



1. Vaginal acidity

Glycogen is produced by vaginal epithelium influenced by oestrogens and is converted to lactic acid by Doderlein’s bacillus (a type of B. acidophilus). This maintains the vaginal pH between 3 and 4 which inhibits most other organisms.


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2. Thick layer of vaginal squamous epithelium

This is a considerable physical barrier to infection. Continual desquamation of the superficial kerato-hyalin layer and glycogen production, both dependent upon ovarian oestrogen action, combat bacteria. In children and postmenopausal patients, the epithelium lacks oestrogen stimulation and is thin and easily traumatised or infected.


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3. Closure of the introitus

The vaginal canal is only a potential space kept closed by the surrounding muscles and provides another physical barrier. This, however, alters following sexual activity and pregnancy.


4. Glandular secretions from the cervix and Bartholin’s glands maintain an outward fluid current helping to clear the canal of debris. In addition, cervical secretion contains immunoglobulins, especially IgA, and there are varying numbers of polymorphs, lymphocytes and macrophages.



Vulval inflammation


Vulval inflammation is not uncommon but is usually an extension of infection from the vagina. A mild reaction may arise because of physical and anatomical conditions in the area, such as (a) moistness and (b) proximity of urethra and anus.


The area is not only naturally moist but also warm, particularly in obese patients. The folds of fat harbour moisture, and chafing occurs between them. The proliferation of bacteria is encouraged. Urinary incontinence and unsuspected glycosuria may add to this. It is important to test the urine for sugar in all patients.


Incidental factors may intensify any reaction resulting from these conditions, for example, the wearing of nylon underwear which is heat-retaining and non-absorptive. Chemical factors such as washing underclothes with detergents, and using toilet powders, perfumes and deodorants, which intensify the reaction, may be associated with this. The clinical result is irritation and itching leading to scratching. Continual itch-scratch-itch leads to maceration of the skin and may invite infection. Careful attention to personal hygiene is essential. Obese patients should be encouraged to lose weight and all the incidental factors mentioned above should be avoided.


Search for lice or scabies should be made where appropriate.


One of the complications of vulvar inflammation is obstruction of the duct of Bartholin’s gland. Cystic dilatation and abscess formation are apt to follow. The condition occurs during a woman’s sexual life. Any organism, staphylococcal, coliform or gonococcal, may be found.


The gland lies partly behind the bulb of the vestibule and is covered by skin and the bulbospongiosus muscle. The duct is 2 cm long and opens into the vaginal orifice lateral to the hymen.


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Treatment


Marsupialisation (Gk. marsipos, a bag). The cyst or abscess is widely opened within the labium minus and drained, and its walls sutured to the skin leaving a large orifice, which it is hoped will form a new duct orifice and allow conservation of the gland. A ribbon-gauze pack is inserted for 48 h by some surgeons.


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Vaginal discharge and infection


A small amount of vaginal discharge is normal in adult life and may be excessive in the presence of cervical ectopy. Cervical ectopy is where the glandular epithelium from the endocervix is visible on the ectocervix.



Composition


The vaginal discharge is composed of tissue fluid, cell debris, carbohydrate, lactobacilli and lactic acid. The pH is about 4.5, a degree of acidity that inhibits the growth of organisms other than the lactobacilli.



Source of vaginal discharge


Vulva: Greater vestibular glands, glands of vulval skin.


Vagina: Mainly desquamated epithelial cells which liberate glycogen. The lactobacilli metabolise the glycogen to lactic acid. Vaginal transudate (secretion from tissues and capillaries of the mature vagina) is often described; vaginal epithelium is certainly not water resistant (like transitional epithelium). There are no mucosal glands.


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Cervix: Alkaline mucous secretion which becomes copious and watery during ovulation.


Uterine glands also discharge into the vagina.



Clinical features


Volume: The need to wear a pad or tampon continuously suggests excessive discharge.


Onset: Onset can be associated with the end of a pregnancy, the contraceptive pill, a course of antibiotic.


Colour: Normal discharge is white but stains yellow or pale brown on clothing or pads. A greenish-yellow colour suggests pyogenic infection, commonly accompanied by an unpleasant odour. Red or dark brown suggests blood.


Irritation: Any discharge can in time excoriate the vulva, but often Candida and Trichomonas cause itching.



Complaints of vaginal discharge


Women will complain under the following conditions.


(a) There appears to be an excessive amount of staining on the clothing.

(b) They detect an offensive smell.

(c) They suffer local irritation.

There is often little correlation between symptoms and signs. Some women will complain of what is really normal; and gynaecologists regularly observe heavy and purulent discharge in women who deny any symptoms at all.



Examination



1. Vulva, perineum and thighs are inspected for signs of excoriation. The vestibular glands and urethral meatus are observed and palpated.

2. Vaginal walls and cervix are examined through a speculum. Normal vaginal epithelium is pink, the rugae are well marked and the epithelial surface of the cervix smooth and moist. Normal discharge is white and odourless.

3. A bimanual examination should always be made.

4. Specimens of discharge are taken for microscopy and culture. Chlamydia must be excluded. Cervical rather than vaginal swabs should be taken and a separate swab and appropriate medium are essential for Chlamydia. A urine sample can also be taken for Chlamydia DNA analysis.


Leucorrhoea


This means an excessive amount of normal discharge – a very subjective assessment. The patient will complain of constantly having to change her clothes but there will be no irritation and appearance will be normal. The smell will be the normal vulval odour (from the action of commensal bacteria on the secretions of the apocrine sex glands); microscopy will reveal normal appearances and culture will grow only lactobacilli.


The patient should be reassured and given an explanation of normal physiology. No local treatment is necessary.



Vaginal discharge



Candida albicans


This is yeast and exists in two forms – slender branching hyphae or as a small globular spore which multiplies by budding.


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Source of Infection


This organism may exist as a normal commensal in the rectum and small numbers may be found in the vagina. Sexual transmission is also possible. Symptomatic infection is most likely to arise when there are predisposing conditions, examples of which are given below:


1. Pregnancy. The vagina provides a tropical microclimate and the high concentration of sex steroids in the blood maintains an increased glycogen formation in the vaginal epithelium and may alter the local pH.

2. Immunosuppressive therapy. This includes cytotoxic drugs and corticosteroids. There is also thought to be a natural degree of immunosuppression during pregnancy.

3. Glycosuria. This may be due to undiscovered diabetes, but again a mild degree of glycosuria may exist in a normal pregnancy because of the lowering of the renal threshold for sugar.

4. Antibiotic therapy. Systemic antibiotics destroy the normal bacteria, thus reducing the competition for nutrients, leaving the field clear for C. albicans.


Clinical Features


The patient is usually between 20 and 40, when oestrogen support of the epithelial glycogen content is at its highest. The complaint is of irritant discharge and dyspareunia. Examination reveals an inflamed and tender vagina and vulva with white plaques resembling curdled milk adhering to the vaginal wall and vulva. Removal of the plaque reveals a red inflamed area. Pre-pubertal or postmenopausal infection is less common.


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Treatment


A single 500 mg clotrimazole pessary, with external application of 1% clotrimazole cream, offers convenient therapy. Routine treatment of partners is unlikely to reduce recurrence rates. In persistent or recurrent infection, confirmation of the diagnosis by culture and determination of sensitivity to treatment are important.


Oral antifungal medication can also be used.



Bacterial vaginosis


For a long time, a large number of cases of vaginitis were labelled non-specific because of disagreement regarding the infective agent. These cases were characterised by a non-irritating, foul-smelling discharge. The discharge contains a mixture of bacteria.



Clinical Features


The patient complains of a foul-smelling discharge, and examination confirms both the discharge and the odour. In appearance, the discharge is thin, greyish and sometimes shows bubbles. A vaginal smear reveals the presence of ‘clue’ cells. Gram staining is usually negative but can be variable.


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Pus cells tend to be few in number. Lactobacilli are also scanty but frequently many other bacteria are present. The pH of the fluid is raised. Although the main complaint is of malodorous discharge, some patients will have pruritus, frequency, dysuria and dyspareunia.



Treatment

Related posts:

  1. Physiology of the Reproductive Tract
  2. Complications of Gynaecological Surgery
  3. Diseases of the Cervix
  4. Abnormalities of Menstruation

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Jun 4, 2016 | Posted by in GYNECOLOGY | Comments Off on Gynaecological Infections

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