Common causes of EID sample rejection in Zimbabwe and how to mitigate them.

Early infant diagnosis (EID) of HIV provides an opportunity for early HIV detection and access to appropriate Antiretroviral treatment (ART). Dried Blood Spot (DBS) samples are used for EID of exposed infants, born to HIV-positive mothers. However, DBS rejection rates in Zimbabwe have been exceeding the target of less than 2% per month set by the National Microbiology Reference Laboratory (NMRL), in Harare. The aim of this study was to determine the DBS sample rejection rate, the reasons for rejection and the possible associations between rejection and level of health facility where the samples were collected. This is an analytical cross-sectional study using routine DBS sample data from the NMRL in Harare, Zimbabwe, between January and December 2017.A total of 34 950 DBS samples were received at the NMRL. Of these, 1291(4%) were rejected. Reasons for rejection were insufficient specimen volume (72%), missing request form (11%), missing sample (6%), cross-contamination (6%), mismatch of information (4%) and clotted sample (1%). Samples collected from clinics/rural health facilities were five times more likely to be rejected compared to those from a central hospital. Rejection rates were above the set target of <2%. The reasons for rejection were 'pre-analytical' errors including labelling errors, missing or inconsistent data, and insufficient blood collected. Samples collected at primary healthcare facilities had higher rejection rates.

Antimicrobial susceptibility in Neisseria gonorrhoeae isolates from five sentinel surveillance sites in Zimbabwe, 2015-2016.

OBJECTIVES: Gonorrhoea and antimicrobial resistance (AMR) in Neisseria gonorrhoeae are major public health concerns worldwide. Enhanced AMR surveillance for gonococci is essential globally. In Zimbabwe, very limited gonococcal AMR data were reported. Our aims were to (i) implement quality-assured gonococcal AMR surveillance in Zimbabwe and (ii) investigate gonococcal AMR at five health centres in 2015-2016. METHODS: Gonococcal isolates from 104 men with urethral discharge were tested for susceptibility to kanamycin, ceftriaxone, cefixime, ciprofloxacin and azithromycin using Etest. RESULTS: All isolates (102 possible to test) were susceptible to ceftriaxone and cefixime. The level of resistance (intermediate resistance) to kanamycin and ciprofloxacin was 2.0% (2.0%) and 18.6% (27.5%), respectively. The two kanamycin-resistant isolates (R≥128 mg/L) had a kanamycin minimum inhibitory concentration (MIC) of >256 mg/L. The ciprofloxacin resistance ranged from 9.5% to 30.8% in the five sentinel sites. Only 10 (9.6%) of the isolates were tested for susceptibility to azithromycin and 1 (10.0%) was resistant (MIC=4 mg/L). CONCLUSIONS: The emergence of multidrug-resistant gonorrhoea internationally is a major public health concern and gonococcal AMR surveillance is crucial globally. In Zimbabwe, gonococcal AMR surveillance has now been implemented and quality assured according to WHO standards. The results of this first surveillance will be used to directly inform revisions of the national treatment guidelines. It is imperative to further strengthen the surveillance of gonococcal AMR, and ideally also treatment failures, in Zimbabwe and most countries in the WHO African region, which requires continuous national and international support, including technical support, and political and financial commitment.