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Biomedical subjects

C K Fairley

Publications and source records attributed to C K Fairley.

At least 37 records · Page 2Linked to original sources

Testing men who have sex with men for Neisseria gonorrhoeae and Chlamydia trachomatis prior to the introduction of guidelines at an STD clinic in Melbourne.

BACKGROUND: Guidelines for testing men who have sex with men (MSM) were published in 2002. They did not recommend asymptomatic screening for urethral gonorrhoea or pharyngeal screening for chlamydia. To determine if these guidelines were appropriate, we audited gonorrhoea and chlamydia testing of MSM at our Centre. METHODS: We carried out two audits at our Centre between August 2001 and July 2002. The first was an audit of testing MSM for gonorrhoea and/or chlamydia over 12 days. The second was an audit of all positive tests over this 12-month period for gonorrhoea or chlamydia among MSM. RESULTS: During the 12 selected days 89 of 286 men tested (31%) were MSM. Among the MSM testing positive for gonorrhoea and/or chlamydia infection (15, 17%), symptomatic urethral infection was the most common (n = 8). No rectal and pharyngeal infections had site-specific symptoms. Based on the guidelines, 100 of the 334 tests ordered (30%) were not recommended according to the guidelines, and none of these 100 tests yielded a positive result. Over the 12-month audit period, 135 MSM were diagnosed with gonorrhoea and/or chlamydia. For gonorrhoea, site specific symptoms were present in 42 of 43 cases of urethral infection (98%), six of 23 cases of rectal infection (26%), and no cases of pharyngeal infection had symptoms. For chlamydia, site-specific symptoms were present in 29 of 48 cases of urethral infection (60%), six of 33 cases of rectal infection (18%), and in one of the two cases of pharyngeal chlamydia identified. A substantial proportion of cases occurred in clients with HIV infection (21, 16%). CONCLUSIONS: These findings strongly support screening among MSM and in particular not testing asymptomatic MSM for urethral gonorrhoea or any MSM for pharyngeal chlamydia.

Adult↗

Predictors for non-adherence to antiretroviral therapy.

OBJECTIVES: To determine the risk factors for non-adherence to antiretroviral therapy. METHODS: Two hundred clients attending the Melbourne Sexual Health Centre completed a questionnaire about lifestyle, self-efficacy, depression, drug or alcohol use, social supports, and attitudes to health care. Self-reported adherence (SRA) was measured by missed doses in the last 4, 7 and 28 days. Routinely collected viral load levels were reviewed. RESULTS: Two hundred (85%) out of 231 eligible clients participated in the study. Viral load was most strongly associated with SRA for the last 28 days (P < 0.001). Non-adherence was defined as <98.2% SRA. Non-adherence was most strongly associated with having regular daily routines [odds ratio and 95% confidence interval = 0.4 (0.2, 0.7)], having set times for getting up and going to bed [0.5 (0.3, 1.0)], using marijuana more than 4 times per week [0.4 (0.2, 1.0)] and lower self-efficacy which included; being sure that you will be able to take medications as directed [0.2 (0.1, 0.6)] and being sure that missing doses of HIV medication will result in drug resistance [0.4 (0.2, 0.7)]. When significant questions were combined into a composite score to screen for non-adherence, the sensitivity to predict non-adherence was as high as 71% with a specificity of 59%. CONCLUSIONS: This study showed that a 10-min questionnaire was associated with clients past non-adherence to antiretroviral therapy and may be useful for predicting future adherence.

Adult↗

Multidisciplinary HIV adherence intervention: a randomized study.

Maintaining greater than 95% adherence to antiretroviral medication is necessary in order to have the greatest therapeutic impact on HIV infection. Furthermore, evidence suggests that adherence rates of between 70% and 89% are significantly associated with viral rebound and the development of drug resistance. Adherence rates at and above the 95% level are difficult for patients to achieve and maintain. Our aim was to determine if an adherence intervention could improve adherence among patients attending an ambulatory care clinic at a large public hospital. The intervention was delivered by a multidisciplinary team of health care professionals and consisted of education coupled with the provision of devices designed to assist patient memory and adherence. A crucial component of the intervention consisted of the identification of patient specific barriers to adherence and the development of strategies to circumvent these problems. Adherence was assessed using patient self-report over the past 4, 7, and 28 days and by calculation of the Morisky score. The study was conducted as a randomised controlled trial using the stepped wedge design with a total of 68 subjects randomised to receive the intervention over a 20-week period. Adherence before and after the intervention formed the analysis. There was a significant decrease in the number of missed doses over the past 4 (1.9 to 1.0, p < 0.001), 7 (3.0 to 1.8, p < 0.001) and 28 (7.4 to 4.2, p < 0.001) days and a decrease in the Morisky score, indicating an improvement in medication taking behaviour (1.3 to 0.5 p < 0.001).

Adult↗

Validation of roche COBAS Amplicor assay for detection of Chlamydia trachomatis in rectal and pharyngeal specimens by an omp1 PCR assay.

Screening guidelines for men who have sex with men (MSM) recommend testing of extragenital sites (pharyngeal and rectal) for gonorrhoea and chlamydia. Testing of specimens from these sites is not validated by most commercial nucleic amplification tests, such as the COBAS Amplicor assay. To investigate the utility of the COBAS Amplicor assay for detection of Chlamydia trachomatis in extragenital specimens, this study developed and evaluated confirmatory tests using the omp1 gene as an alternative target for amplification by PCR. Of anal and throat swabs collected from men in male-only saunas, 52 swabs that tested C. trachomatis positive by COBAS Amplicor and 30 swabs that tested as negative were included for confirmatory omp1 PCR testing. A total of 49 (94%) COBAS Amplicor-positive samples were confirmed by the omp1 PCR. A substantial proportion of specimens were confirmed by using a nested omp1 PCR (27%). Not confirmed by any omp1 PCR were three anal swabs (6%). It is most probable that these samples contained lower bacterial levels that were near or below the detection level of the omp1 PCR assays. The findings of this study support the confident reporting of C. trachomatis detected by COBAS Amplicor in extragenital specimens and support the utility of this assay as a screening test for MSM.

Chlamydia trachomatis↗

Current practice of sexual history taking by sexual health physicians in Australia and New Zealand.

OBJECTIVES: To document the current practice of fellows of the Australasian College of Sexual Health Physicians (ACSHP) when taking a sexual history from a new client. METHOD: A postal questionnaire was sent to all eligible fellows practising sexual health medicine in public sexual health centres in Australia and New Zealand (n = 93). The study period extended from 3 February to 4 April 2003 inclusive. RESULTS: 77 (83%) fellows returned the questionnaire and, of these, 71 (76%) were eligible for inclusion in the analysis. The median number of years of practising sexual health medicine was 16 (range 5-32) with 70% having worked in the field for 10 years or more. The generic questions that fellows asked most often concerned the presenting complaint/reason for attendance, the history of the presenting complaint, current sexual relationship status and last sexual contact, history of sexually transmitted infections (STIs), use of condoms during sexual intercourse in the past 3 months, and pattern (always, usually, sometimes, never) of condom use during that time period. The least frequently asked generic questions concerned age at first sexual activity, the number of sexual contacts, lifetime condom use, and hepatitis A status. CONCLUSION: This study establishes the consistency and variability of sexual health information currently collected by fellows of the ACSHP when taking a history from a new client.

Australia↗

HIV partner notification: a 2002 Victorian audit.

This audit was carried out in August 2003 and examined HIV notification data in Victoria. We aimed to determine the proportion of partners reported as being traced from newly diagnosed HIV individuals, the type of contact tracing used and identify the number of HIV cases newly diagnosed from contact tracing. We compared men who have sex with men (MSM) with all other newly diagnosed HIV individuals in Victoria (non-MSM). Of the 215 newly diagnosed HIV-positive individuals, 49% (n = 105) could potentially carry out contact tracing. There was a difference between MSM and non-MSM in the proportion of contactable partners (44% vs 63% respectively, P = 0.017). MSM less commonly used provider referral than non-MSM (12% vs 53% respectively, P < 0.001) but more commonly used patient referral (41% MSM vs 9% non-MSM, P = 0.001). Of the 13 individuals found to be HIV-positive through contact tracing, nine (69%) were non-MSM.

Adolescent↗

Partner notification: preferences of Melbourne clients and the estimated proportion of sexual partners they can contact.

This study was conducted to determine the estimated proportion of contactable sexual partners, the most common types of contact information available and the most acceptable contact tracing strategies for our clients. Five hundred 'walk in' clients completed a questionnaire about their total number of sexual partners, the proportion of contactable partners and available contact information. Women had the highest estimated number of contactable partners (89-94%), men who have sex with men had the lowest (51-73%). The preferred contact tracing strategy was to give partners a website address (76%) and the least preferred was provider referral (33%). There was a difference in the type of information available for contacting sexual partners (P <0.001); most commonly clients reported partners contactable by phone or face to face and least commonly through a third person. The currently used method (doctor's letter) is not the preferred choice of these clients and more innovative methods using recent technology may prove more effective.

Adult↗

Screening for Neisseria gonorrhoeae and Chlamydia trachomatis in men who have sex with men at male-only saunas.

BACKGROUND AND OBJECTIVES: In response to increases in sexually transmissible infections (STI) and HIV infection rates among men who have sex with men (MSM), the current study aimed to investigate the feasibility of a screening program at male-only saunas in Melbourne, Australia. GOAL: The goal was to determine (1) the participation rate, and the proportion whom obtain test results; (2) the prevalence of gonorrhea and chlamydia; and (3) to evaluate risk factors for STI acquisition. STUDY DESIGN: We used a cross-sectional design. Pharyngeal, rectal, and urethral specimens were collected from participants, and tested for Chlamydia trachomatis and Neisseria gonorrhoeae by polymerase chain reaction (PCR). RESULTS: There was a participation rate of 24% (n=521), and 70% obtained their test results. The infection rate in those who failed to collect their results was no different than those seeking theirs. The proportion of participants with PCR-detected gonorrhea and/or chlamydia infection was high, 10.7%. The presence of infection was associated with seeking sexual health care in the last year. CONCLUSION: The high prevalence rate of gonorrhea and chlamydia supports the concept of a screening program in Melbourne male-only saunas. The low participation rate has highlighted the need to consider alternative methods for making contact with men in the saunas or offering incentives to participate in future screening programs. Although anonymous participation encouraged participation for some men, future programs should attempt to obtain contact details for follow up of positive test results.

Adult↗

Predictors of the prevalence of bacterial STI among young disadvantaged Indigenous people in north Queensland, Australia.

OBJECTIVE: To identify sexually transmitted infections in rural and remote Indigenous communities in north eastern Australia and examine factors that may influence prevalence. METHODS: A cross sectional survey of 26 Aboriginal and Torres Strait Islander communities in northern Queensland was carried out. 3313 people (2862 Indigenous) aged 15 years and over resident in participating communities during the period March 1998 to December 2000. The main outcome measures were community and population prevalence of chlamydia and gonorrhoea and independently associated risk factors. RESULTS: A total of 238 cases of chlamydia, 66 cases of gonorrhoea, and 37 cases of co-infection were detected among Indigenous participants. Prevalence of chlamydia and/or gonorrhoea ranged from 23.0% among 15-19 year olds to 3.5% among those 40 years and older. In the adjusted analysis younger age, female sex, lower socioeconomic status, the use of alcohol and tobacco, and the structure of community health services were independently associated with a higher prevalence of bacterial STI. CONCLUSION: This study highlights the need for improved STI control in north Queensland Indigenous communities through strategies to improve the reach and accessibility of primary healthcare services.

Adolescent↗

Effects of a change from an appointment service to a walk-in triage service at a sexual health centre.

A walk-in triage system (WITS) was introduced at Melbourne Sexual Health Centre in August 2001 as a result of the perceived need to increase access to the clinic for clients requiring immediate assessment. An audit of this alteration to clinic operation resulted in a significant increase in the number of new clients attending the clinic who were younger and less likely to report using condoms, substantial increases in the number of investigations ordered for bacterial sexually transmitted infections (STIs) and an increase in the detection of genital herpes and chlamydia. There are a number of possible explanations for these changes other than the change to clinic operation but these are less likely causes for the observed changes. Our findings should complement the other reasons to adopt a WITS system, such as improving access for those most in need and vital to reach if STI rates are to fall.

Adolescent↗

Randomized trial of an adherence programme for clients with HIV.

Our aim was to determine if a comprehensive adherence package improved self reported adherence to antiretroviral therapy. The adherence package included an education programme, individualized planning of regimens, and the opportunity for a patient to choose from a number of adherence aids and reminder devices. A randomized step wedge design was used. Forty-three individuals were randomized to begin the intervention over a five-month period. There was a substantial fall in the number of missed doses reported for the last four days (0.76 to 0.38, P =0.03) and last seven days (1.5 to 0.74, P =0.005) but not for the last 28 days (2.5 to 2.5, P =0.63). There was no statistical difference in the viral load or CD4 lymphocyte count in the period before or after the intervention. The Morisky score during the pre and post intervention periods was significantly different (P =0.006), 2.9 (SD 0.9) and 3.3 (SD 0.8) respectively. This adherence package improved self reported adherence during the last four and seven days.

Adult↗

Case-control studies of sporadic cryptosporidiosis in Melbourne and Adelaide, Australia.

Few studies have assessed risk factors for sporadic cryptosporidiosis in industrialized countries, even though it may be numerically more common than outbreaks of disease. We carried out case-control studies assessing risk factors for sporadic disease in Melbourne and Adelaide, which have water supplies from different ends of the raw water spectrum. In addition to examining drinking water, we assessed several other exposures. 201 cases and 795 controls were recruited for Melbourne and 134 cases and 536 controls were recruited for Adelaide. Risk factors were similar for the two cities, with swimming in public pools and contact with a person with diarrhoea being most important. The consumption of plain tap water was not found to be associated with disease. This study emphasizes the need for regular public health messages to the public and swimming pool managers in an attempt to prevent sporadic cryptosporidiosis, as well as outbreaks of disease.

Adolescent↗

Bacteraemia due to Stenotrophomonas maltophilia: an analysis of 45 episodes.

OBJECTIVE: Stenotrophomonas maltophilia is an important nosocomial pathogen and a therapeutic challenge. A ten-year review of episodes of bacteraemia due to S. maltophilia was undertaken in light of reports of an increasing frequency of infection. METHODS: A retrospective analysis of bloodstream infections due toS. maltophilia at a tertiary care hospital in Melbourne, Australia. Cases were identified via microbiology laboratory reports, and relevant clinical data were collected from the medical record of each patient. RESULTS: Eighty per cent of these 45 episodes were nosocomial. The most common characteristics in cases of bacteraemia were the presence of an indwelling central venous catheter (CVC) (38/45, 84%) and previous antibiotic therapy (33/45, 73%). There were 8 deaths (8/44, 18%) within 7 days of bacteraemia. A significant correlation was found between deaths and a failure to remove the CVC (P = 0.01) or treat with appropriate antimicrobials (P = 0.01). Antibiotic susceptibility testing revealed that isolates were most sensitive to sulphamethoxazole (80%), chloramphenicol (75.5%) and ceftazidime (64.5%). CONCLUSIONS: S. maltophilia is an important pathogen especially in the highly compromised host. Isolation of this organism from a blood culture should prompt a careful review of the patient with particular emphasis on removal of indwelling CVCs and commencement of appropriate antibiotic therapy.

Adult↗

The rate of gastroenteritis in a large city before and after chlorination.

There is conflicting evidence about the contribution of drinking water to endemic community gastroenteritis in water supplies which meet conventional microbiological standards with some studies reporting associations between drinking water and endemic disease and others finding no evidence that water is implicated in disease. This study reports the results of an ecological study investigating the effect on community gastroenteritis of chlorinating a city of over 3 million people in the mid 1970s. Prior to chlorination faecal coliforms were regularly identified in the water. Admissions for gastroenteritis and attendances to the Emergency Department of the Royal Children's Hospital, Melbourne's major children's hospital, were measured between 1974 and 1980 inclusive and the influence of chlorination on rates of gastroenteritis was examined. No statistically significant difference was found in the number of admissions or emergency department visits before and after chlorination of the water supply. The study highlights the need for caution when interpreting the relationships between drinking water and gastroenteritis. The result suggests that water was not a dominant contributor to the burden of gastrointestinal disease in the community despite faecal coliforms being present in the water supply. It indicates the need for caution when attributing significant illness to drinking water when there have been only small changes in water quality without first stringently reviewing the studies methodology and understanding their limitations.

Child, Preschool↗