GENITAL ULCER DISEASE (GUD) IS a significant risk factor both for acquisition and onward transmission of human immunodeficiency virus (HIV).1 Early diagnosis and correct treatment of GUD is therefore an important element of any HIV control program. In Durban, South Africa, a significant association between GUD and HIV was identified early on.2 Syphilis and chancroid were then common in Durban as elsewhere in other parts of Africa,3,4 but these conditions have both declined whereas genital herpes has emerged as the most frequent cause of GUD in Southern Africa.5–9
Current World Health Organization sexually transmitted infections (STI) treatment guidelines for GUD10 now recommend treatment for chancroid and syphilis, and herpes if the prevalence is 30% or greater, and, if episodic therapy is chosen, treatment should be started during the prodrome or within 1 day after onset of lesions. However, there is a need to validate these guidelines that include counseling and education in Africa where the association between genital herpes and HIV is strong.11 Treatment for genital herpes is still considered not to be feasible in the public sector because of lack of education about symptom recognition and cost of therapy. We therefore sought to determine the etiology of genital ulcers in men in Durban and assess other STI-related presentation and treatment patterns in this group, which has a high prevalence of HIV.
Consecutive men attending the Prince Cyril Zulu STI clinic in Durban for a new STI-related problem between January and March 2004 were enrolled. Inclusion criteria for subjects were being sexually active, heterosexual, aged 16 to 75, and with the potential ability to return in 2 weeks. Subjects were included even though they may have had antibiotics in the previous 14 days. Signed consent was obtained from all subjects. At enrollment, sociodemographic data were obtained and a sexual behavior questionnaire was administered by a trained interviewer in a face-to-face interview as reported previously.12 Subjects were initially asked about their presenting complaint(s) as an open question. They were then asked if they had any additional complaints relating to genital ulceration, urethral discharge, or dysuria. Information about duration of symptoms of the main initial unprompted complaint was collected. Clinical examination of the genital area was performed by a physician and information recorded on circumcision status. For this study, a genital ulcer was defined as an area with mucosal discontinuity and included healing lesions. Patients with vesicles only were also included. Additional information about symptoms and clinical signs was elicited during the examination. Cases were managed according to National STI syndromic guidelines.
Specimen Collection and Laboratory Methodology
Ulcers were cleaned with a sterile dry gauze and impression smears made onto glass slides for the detection of Calymmatobacterium granulomatis by RapiDiff staining.7 A specimen was then obtained by rolling a Probetec cervical sponge over the base of the ulcer. The material collected was suspended in 1.0 mL phosphate buffered saline, pH 7.6 and placed in an ice-containing cooler box that was transported to the laboratory within 4 hours. DNA was extracted immediately on arrival using the Qiagen Blood and Tissue Mini Kit (Qiagen, CA). DNA was stored at −70°C until use.
Polymerase chain reaction (PCR) was used for the detection of herpes simplex virus type 2 (HSV-2), Treponema pallidum, Chlamydia trachomatis lymphogranuloma venereum (LGV) biovars, and Haemophilus ducreyi, as described previously.7,13 LGV was diagnosed using a nucleic acid amplification test14: a PCR targeting the 60-kd cysteine-rich outer membrane protein was followed by digestion with AccI. C. trachomatis L2 (ATCC VR-902B), C. trachomatis trachoma biovar (a laboratory isolate from a cervical specimen) and water were included as controls in each run. Detection of Neisseria gonorrhoeae and C. trachomatis on urethral specimens from subjects with dysuria or urethral discharge was performed by means of the Strand Displacement Test (ProbeTec) whereas an in-house PCR was used for Trichomonas vaginalis (TV).15 Specimens negative in all in-house PCR were subjected to a β-globin PCR. Those testing negative were excluded.
HIV was diagnosed using Determine HIV 1/2 (Abbott Laboratories, Chicago, IL). Positive results were confirmed with a second serological test (Capillus HIV1/2, Trinity Biotech, NJ). Serological testing for HSV-2 antibodies was by Focus HSV-2 (Focus Diagnostics, Cypress, CA) with a positive test defined as a ratio of 1.10 or more of the optical density reading over that of the cut-off calibrator provided with the kit. Serological testing for syphilis was with the rapid plasma reagin (RPR) test (Becton Dickinson, Cockeysville, MD) and T. pallidum hemagglutination assay (Omega Diagnostics, UK). All laboratory testing was carried out unlinked and anonymized. Data from the questionnaires were also anonymized and linked to the results of laboratory testing. Participants were offered voluntary counseling and testing for HIV at the clinic site.
Swabs were taken from the subpreputial space in an additional 9 patients without genital ulcers, 5 of whom had balanitis diagnosed clinically and 4 with marked inguinal lymphadenopathy. Fine-needle biopsies from lymph nodes were obtained for PCR to diagnose herpes, syphilis, chancroid, and LGV infections in 4 of these 9 cases, 3 of whom had marked inguinal lymphadenopathy alone and 1 had both balanitis and inguinal lymphadenopathy.
Analysis and Informed Consent
Questionnaire data were double-entered and validated using EpiData v3.0.16 Laboratory data were entered into an Excel spreadsheet (Microsoft). The sensitivity, specificity, and positive and negative predictive values of self-reported and prompted symptoms of genital ulceration in men with genital ulceration on clinical examination were assessed. Ethical approval for the study was obtained from the ethics committees of the Nelson Mandela Medical School, University of KwaZulu-Natal, Ethekwini Municipality Health Department Research Committee, Durban, and the London School of Hygiene and Tropical Medicine.
Six hundred and fifty men were asked to participate and none declined. Of these, 165 had genital ulcers confirmed on clinical examination and completed questionnaires. Laboratory results were available for 162. Table 1 shows some of the presenting features and microbial etiology of patients with genital ulcers among STI clinic attenders.
Data were available for 164 of 165 patients. The mean age was 29.9, standard deviation 7.8. Seventy-six (46.3%) were new patients, 35 (21.2%) had no education or primary education only, 12 (7.3%) were married, 50 (30.3%) were living with a partner, and 158 (95.8%) were uncircumcised. Fourteen (8.5%) had received antibiotics in the last 14 days.
Analysis of Symptoms
Of the 161 men who complained of a genital ulcer spontaneously, 128 (79.5%) had ulcers on clinical examination (Table 1). An additional 30 complained of genital ulcers on direct questioning; 18 had ulcers confirmed on examination. Only 1 case presented with vesicles typical of genital herpes. Nineteen of those with ulcers on clinical examination did not complain of ulcers. Table 2 shows the sensitivity, specificity, and positive and negative predictive values of self-reported and prompted symptoms of genital ulcers compared with ulcers observed on clinical examination. History-taking using prompting increased the sensitivity of reported genital ulceration from 77.6% to 88.5%, but reduced the specificity from 93.2% to 90.7% and the positive predictive value from 79.5% to 76.4%.
Microbiology and Serology
Of the 162 patients with genital ulcers confirmed by clinical examination and with samples for microbiologic analysis, 126 (77.7%) were HIV-positive and 137 of 160 (84.6%) had antibodies to HSV-2. PCR results showed the following prevalences: HSV-2 87 (53.7%), LGV 22 (13.6%), syphilis 6 (3.7%), chancroid 2 (1.2%), mixed 10 (6.2%) including 7 with genital herpes and LGV, 2 with syphilis and LGV, and 1 with chancroid and LGV. The prevalence of HIV in those with HSV-2 and LGV infections detected in ulcers was 77% and 86.4%, respectively. One case of donovanosis was diagnosed clinically. No pathogens were identified in 54 (33.3%) in whom 8 (14.8%) had positive T. pallidum hemagglutination assay and RPR tests, 46 (85.2%) had antibodies to HSV-2, and 40 (74.1%) were HIV-positive. LGV was confirmed in an additional 4 patients, all HIV-positive, without ulcers, 3 from material obtained by fine needle aspiration from inguinal lymph nodes and 1 by swabbing the subpreputial space.
Duration of Ulcers Before Presentation
The duration of delay before presentation to the clinic in all patients with genital ulcers (n = 120) was 0 to 3 days in 20 (16.7%), 4 to 7 days in 55 (45.8%), 8 to 14 days in 19 (15.8%), 15 to 30 days in 13 (10.8%), and >30 days in 18 (10.8%). The duration of ulceration was available for 68 of the men with genital herpes confirmed by PCR testing in whom the delay before attending was 0 to 3 days in 16 (23.5%), 4 to 7 days in 32 (47.1%), 8 to 14 days in 8 (11.8%), 15 to 30 days in 8 (11.8%), and >30 days in 4 (5.9%): only 1 person presented within 1 day; HSV-2 antibodies were not detected in 11 of the 68 men, 6 of whom presented between 1 and 3 days and 5 between 4 and 7 days after onset of symptoms. The delay before attending in the 39 subjects (overall = 54, data for 39) with GUD and no pathogens identified was 1 to 3 days in 4 (10.3%), 4 to 7 days in 17 (43.6%), 8 to 14 days in 8 (20.5%), 15 to 30 days in 3 (7.7%), and >30 days in 7 (17.9%). There was little difference in the delay before attending between those with either genital herpes or no pathogens identified.
Genital Ulcers, Dysuria, Urethral Discharge
Seventy-nine of the 165 (47.8%) patients with confirmed ulcers on examination complained either initially or during the clinical examination and further questioning of either urethral discharge or dysuria or were found to have urethral discharge. In this group, the following STIs were identified: gonorrhoea and/or chlamydia in 19 and trichomoniasis in 13, including 3 with both gonorrhoea and chlamydia, 1 each with gonorrhoea or chlamydia. Of the 87 genital herpes cases confirmed by PCR, 44 (50.6%) complained of either dysuria or urethral discharge although only 15 complained of urethral discharge, 8 had gonorrhoea, an additional 3 had chlamydia, and 3 had trichomoniasis (1 with gonorrhoea and 1 with chlamydia). All the patients with both ulcers confirmed on examination and urethral discharge/dysuria received treatment for chancroid, syphilis, gonorrhoea, and chlamydia although only 5 additional coinfections with syphilis, all with low RPR titers were identified.
We found a notable inconsistency between patients’ symptoms and what was found on clinical examination. The addition of prompting to patients’ spontaneous complaints increased the sensitivity but decreased the specificity and positive predictive value of history taking. Of note, we also found 45 patients who reported ulcers who did not have ulcers reinforcing the need both to spend time with patients to probe about other complaints and conduct a clinical genital examination to include retracting the foreskin in uncircumcised men.
The high prevalence of HSV-2 identified from genital ulcers and associated dysuria cautions against providing empirical treatment for gonorrhea and chlamydia in ulcer patients with dysuria but without urethral discharge. Our study found that about half of the 165 subjects with a genital ulcer confirmed on examination were also treated for urethritis although only 19 (11.5%) had either gonorrhoea or chlamydia, 15 (78.9%) of whom complained of urethral discharge. A previous study in mineworkers from South Africa concluded that because of the significant prevalence of urethritis in patients with GUD, syndromic management based on the presence of ulcers alone was inappropriate.17 We found much lower prevalences of concomitant infections with gonorrhoea and chlamydia, which may reflect the fact that contact with sex workers with high prevalence rates of gonorrhoea and chlamydia was much higher in the mineworker group than in Durban.12 We did find TV in the urethra of 13 ulcer cases that had tests for TV, and there could be a case for giving metronidazole for urethritis symptoms as in Malawi.18
Although the emergence of herpes in Africa was identified some time ago, strategies to deal with this have been slow to emerge. This is partly attributable to the cost of antiherpes medication and also the self-limiting nature of the condition. We found that about 6% of our patients with genital HSV-2 infection presented either within 1 day of symptoms or greater than 30 days, outside of which time treatment is usually not indicated other than in primary cases or HIV-positive subjects. However, 77% of our subjects with HSV-2-positive ulcers were also HIV-positive. Among STI clinic attenders with GUD in Malawi, an unweighted algorithm with a HSV-2 prevalence of 35% and chancroid of 30% concluded that men aged >25 years with ulcers, symptoms >1 week, shallow or deep ulcers with or without lymph nodes could be treated for herpes, chancroid, and syphilis although herpes treatment was not given routinely.19 Although suppressive therapy is more effective than patient-initiated episodic treatment, the latter is a much cheaper option and could be tried in our population.20,21 However, this would require specific education about recurrent episodes of genital ulceration and would need the provision of adequate levels of motivated trained staff in STI clinics.
Our study identified LGV as the cause of ulceration in 13.6% of cases. We also identified LGV in a few cases without ulcers but with inguinal lymphadenopathy and 1 case with balanitis. This raises the question about onward transmission from individuals without an obvious source of infective material The reasons for the significant LGV prevalence are unclear but improved diagnostics have undoubtedly been a factor. Eighty-six percent of our LGV cases were HIV-positive, a similar level to those with either herpes or ulcers with no cause identified. The clinical diagnosis of LGV is difficult and local syndromic management may not be adequate in that treatment with erythromycin was given for 5 days, whereas World Health Organization advises 2 weeks or even longer for definitive treatment.10 However, good responses to treatment have been reported previously in Durban after 5 days of erythromycin and we would recommend that patients are followed up after 7 days if they are not improving significantly.7
Despite technological advances, a significant number of ulcer cases were seen in whom no definitive diagnosis could be made. We believe that a large proportion of these is owing to genital herpes. Our study showed that the most frequent delay in those with HSV-2 PCR-positive ulcers was 4 to 7 days. Given this delay it may be that the PCR sensitivity would be below that expected both in this group and those with older HSV ulcers that were resolving spontaneously as reported elsewhere.22 Also, we enrolled patients who had received antibiotics in the previous 2 weeks and some of these may have had ulcers because of chancroid, LGV, or syphilis infections not identified by PCR.
Chancroid, syphilis, and donovanosis have diminished considerably in Durban over the last 15 years. The reasons for this are probably multifactorial. First, it could reflect expanded access and higher quality syndromic management than that before the 1990s when tetracycline rather than erythromycin was prescribed widely to cover chancroid and benzathine penicillin administration for syphilis was patchy. The long delays in seeking health care seen previously with donovanosis seem to have been resolved by increased awareness of and willingness to treat at the primary care level. In addition, condom use has increased, although levels of use are still quite low.12
The management of possible cases of syphilis still presents problems. Syphilis has decreased significantly to less than 5% of ulcers, but treatment is still recommended for syphilis in all cases of GUD. This means that those with genital herpes and recurrent herpes are treated for syphilis every time they attend with genital ulcers, and this impacts considerably on staff costs and time. One way of resolving this issue might be to do an on-site RPR test in those with ulcer symptoms of more than 14 days duration when the RPR test has a high sensitivity for detecting early syphilis. The downside of this option would be that a very small number of syphilis ulcers might be missed. However, this would obviate the need for unnecessary benzathine penicillin injections in the majority and would free up time for the RPR test. Furthermore, those with positive RPR results could be treated with 3 injections of benzathine penicillin to cover latent syphilis rather than the 1 injection that they receive currently.
Although algorithms for GUD are generally held in higher regard than those for other STI syndromes conditions,23 this situation has changed with the emergence of genital herpes and there must be real concerns about syndromic management of GUD and the mixed messages of giving treatment for syphilis and chancroid but not herpes in those with genital herpes, particularly in patients with a high prevalence of HIV.
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