Biomedical subjects
Publications and source records attributed to G E Forster.
A patient suffering from the acquired immune deficiency syndrome (AIDS), who developed swelling of the left elbow four weeks after Staphylococcus aureus septicaemia is reported. The cause was osteomyelitis of the olecranon process.
Unilateral infranuclear facial palsy developed in three young homosexual men. All three were positive for antibodies to human immunodeficiency virus (HIV). Two had persistent generalised lymphadenopathy, but the clinical criteria for the acquired immune deficiency syndrome (AIDS) were not fulfilled. There were no features of generalised neuropathy, and no other cause for facial palsy was evident. Recovery was excellent in each patient.
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Disseminated gonococcal infection was diagnosed in an immunocompromised patient who presented with oliogoarthropathy and tenosynovitis. The gonococcal isolate was prototrophic, showed intermediate resistance to penicillin, and belonged to serogroup WII/III. An isolate from the patient's sexual contact showed similar characteristics. The patient had a Saccharomyces opsonin defect, which is associated with childhood infections and has not been reported previously in association with disseminated gonococcal infection. The pathogenetic importance of the unusual isolate and the underlying host defence defect is considered.
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During 1984, 46 women attended the sexually transmitted disease (STD) clinic at St Mary's Hospital alleging that they had been raped. At presentation, 31 (67%) were asymptomatic. Evidence of STD was found in 14 (30%) women, mixed infections occurring in four. Chlamydia trachomatis and Trichomonas vaginalis were each detected in six (13%) patients and Neisseria gonorrhoeae in three (6%). The source of the infection could not confidently be traced to the alleged rapist. Two patients were found to have cervical cytological abnormalities suggestive of cervical intraepithelial neoplasia of grades II or III. One woman became pregnant as a consequence of the sexual assault. Investigations may unveil infection or other abnormalities, which are incidental to the rape but nevertheless require further investigation and treatment.
Forty five (37%) of 121 female contacts of men with non-gonococcal urethritis or gonorrhoea were chlamydia positive, as judged by isolation or by detecting elementary bodies in smears with a fluorescein labelled chlamydial monoclonal antibody. Only six (13%) of these, however, had Papanicolaou stained smears in which there were inclusion like changes suggestive of chlamydial infection. Furthermore, of 15 patients who had such cytological changes, chlamydiae were detected in only six and the abnormalities were found also in Papanicolaou stained smears from 10 (13%) of the 76 chlamydia negative patients. Modifying the Papanicolaou stained smears by including endocervical material did not increase sensitivity. In addition, destaining and restaining them with the monoclonal antibody was time consuming and the results were unreliable. The staining of cervical smears with Papanicolaou reagent is a technique of low sensitivity and specificity for diagnosing or screening for chlamydial cervical infection and cannot be recommended.
When girls aged 15-19 attending a sexually transmitted diseases (STDs) clinic in 1972 and 1982 were studied retrospectively, the prevalence of recognised STDs declined both absolutely and as a proportion of the total women studied. The increased number of attendances was accounted for by "other conditions requiring, or not requiring, treatment." An alternative approach for the classification of these conditions is proposed.
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The prevalence of penicillinase producing Neisseria gonorrhoeae at this hospital increased exponentially from less than 0.5% in 1978 to 6.5% of all isolates in 1982. In January 1983 first line treatment for uncomplicated heterosexual anogenital gonorrhoea was therefore changed from ampicillin and probenecid to spectinomycin. This subsequently cured 95% of cases seen at the Praed Street Clinic. Although there was an initial fall in the monthly isolation rate of penicillinase producing N gonorrhoeae after the introduction of spectinomycin, this was not maintained. The exponential increase in the prevalence of the strain did slow in 1983, rising to only 8.7%. This, however, may have reflected a general decline in the rate of increase of penicillinase producing N gonorrhoeae throughout Britain. The failure to influence the prevalence of penicillinase producing N gonorrhoeae to any great degree may have been due in part to spectinomycin resistance in both penicillinase producing and non-penicillinase-producing N gonorrhoeae. All of the isolates appeared identical, apart from the presence of the 4.4 megadalton plasmid in penicillinase producing N gonorrhoeae, but they could not be linked epidemiologically. Changing treatment in only one of the many venereal diseases clinics in London, where patients have open access to all such clinics, is unlikely to affect the prevalence of penicillinase producing N gonorrhoeae. This has probably been more important than spectinomycin resistance in limiting the effectiveness of spectinomycin in reducing the prevalence of the strain.
Eczema herpeticum is a potentially serious disease that may be fatal. We report two cases of infection with genital herpes simplex virus (HSV) that were complicated by eczema herpeticum and were treated successfully with acyclovir.
The prevalence of sexually transmitted disease (STD) in adolescent girls aged 15-19 attending a department of genitourinary medicine was compared for the years 1972 and 1982. Data were obtained from the confidential register using the coding of the clinic returns to the Department of Health (form SBH 60). There were 1373 patients in 1972 and 1799 in 1982, 6.4% and 7% respectively of the total female clinic population. The prevalence of syphilis, gonorrhoea, and infection with Trichomonas vaginalis, herpes simplex virus, and warts was almost unchanged. Other conditions, which are not classified as STD, were largely responsible for the increase in new attendances, the prevalence of these conditions having nearly doubled over the ten year period. Thus an epidemic of STD has not been shown in this adolescent female population over the past decade.
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In a randomized controlled trial, 41 chronic hepatitis B virus carriers were allocated, by opening numbered computerized randomization envelopes, to receive recombinant interferon-alpha 2A at three different doses: 2.5; 5.0, and 10.0 mU per m2. Thirty-two patients received treatment (6 for 3 months, 26 for 6 months), and 9 patients were controls (received no treatment). Ninety-three per cent of our patients were homosexual, and 41% had anti-HTLV-III in their serum. None of the control patients lost HBeAg. In contrast, six of the anti-HTLV-III-negative patients (33%) responded to treatment (p less than 0.02): five of these responders were homosexual (p less than 0.05). The response rate was greatest (44%) in the anti-HTLV-III-negative patients who received 10 mU per m2 of recombinant interferon-alpha 2A. None of the anti-HTLV-III-positive patients responded to treatment. The percentage reduction of hepatitis B virus DNA was significantly less in the anti-HTLV-III-positive group in comparison to the anti-HTLV-III-negative group at 1 and 4 months of treatment and at 3 months after the end of treatment (p less than 0.05). These patients were younger (33 vs. 42 years, p less than 0.02), had lower mean baseline AST values (42 vs. 80 IU per liter, p less than 0.02) and tended to have milder histological disease. Homosexual men with HBeAg-positive chronic liver disease who are anti-HTLV-III-positive appear to be less responsive to the direct antiviral and immunomodulatory effects of recombinant interferon-alpha 2A. This may be due to the subclinical immunosuppressive effects of co-infection with HTLV-III.
OBJECTIVES: To compare auxotypes, serovars, and antibiograms of tetracycline-resistant Neisseria gonorrhoeae (TRNG) and non-TRNG isolated from patients attending an East London Genitourinary Medicine (GUM) Clinic. To obtain plasmid profiles for penicillinase-producing gonococci (PPNG) as well as presumptive TRNG. To identify differences in patient characteristics for the TRNG and non-TRNG patient groups. STUDY DESIGN: Gonococcal isolates were collected from 400 patients attending the GUM clinic at the Royal London Hospital GUM Clinic over a 1-year period. Isolates (378) were tested for susceptibility to various antibiotics, auxotyped, and serotyped. Plasmid profiles were obtained for PPNG and isolates exhibiting high-level tetracycline resistance (TRNG). The presence of the tet M determinant was confirmed using the polymerase chain reaction (PCR). The PCR product was digested with the restriction endonuclease (RE) Hpa II and electrophoresed on a 2.5% agarose gel to determine an "RE pattern." Patient data were collected by retrospective case-note review. RESULTS: TRNG (n = 42) accounted for 11% of the 378 isolates tested, and the remaining 336 (89%) isolates were non-TRNG. Non-requiring auxotrophy and P1B-2 serovar expression occurred more frequently among TRNG. PPNG accounted for 31% of TRNG and 5% of non-TRNG. Chromosomal resistance to penicillin (CMRNG) was absent among TRNG but accounted for 11% of non-TRNG. One TRNG isolate showed decreased susceptibility to ciprofloxacin (MIC 0.25 mg/l). All isolates were sensitive to cefotaxime, cefixime, spectinomycin, and azithromycin. All TRNG possessed the 25.2 MDa plasmid and produced a PCR product of appropriate size after tet M gene sequence amplification. RE digests of the PCR product gave a single pattern. None of the TRNG in contrast to 18% of the non-TRNG were acquired homosexually. Ethnic distribution differed between the patients with TRNG and patients without non-TRNG (Afro-Caribbean 81% versus 58%; white 19% versus 36%). Most TRNG were acquired in the United Kingdom. CONCLUSIONS: TRNG differ from the non-TRNG in their auxotype and serovar distribution. PPNG are more common among the TRNG isolates, whereas CMRNG appear absent. TRNG are isolated more commonly from Afro-Caribbean patients and were not represented among homosexually acquired isolates.