Evaluation of a short training course of chest X-ray interpretation for the diagnosis of paediatric TB.

BACKGROUND: Chest X-ray (CXR) interpretation is challenging for the diagnosis of paediatric TB. We assessed the performance of a three half-day CXR training module for healthcare workers (HCWs) at low healthcare levels in six high TB incidence countries. METHODS: Within the TB-Speed Decentralization Study, we developed a three half-day training course to identify normal CXR, CXR of good quality and identify six TB-suggestive features. We performed a pre-post training assessment on a pre-defined set of 20 CXR readings. We compared the proportion of correctly interpreted CXRs and the median reading score before and after the training using the McNemar test and a linear mixed model. RESULTS: Of 191 HCWs, 43 (23%) were physicians, 103 (54%) nurses, 18 (9.4%) radiology technicians and 12 (6.3%) other professionals. Of 2,840 CXRs with both assessment, respectively 1,843 (64.9%) and 2,277 (80.2%) were correctly interpreted during pre-training and post-training (P < 0.001). The median reading score improved significantly from 13/20 to 16/20 after the training, after adjusting by country, facility and profession (adjusted ß = 3.31, 95% CI 2.44-4.47). CONCLUSION: Despite some limitations of the course assessment that did not include abnormal non-TB suggestive CXR, study findings suggest that a short CXR training course could improve HCWs' interpretation skills in diagnosing paediatric TB.

CONTEXTE: L'interprétation de la radiographie thoracique (CXR) est un défi pour le diagnostic de la TB pédiatrique. Nous avons évalué la performance d'un module de formation de trois demi-journées sur la CXR destiné aux agents de santé (HCWs) dans six pays où l'incidence de la TB est élevée et où les ressources en services de santé sont limitées. MÉTHODES: Dans le cadre de l'étude de décentralisation TB-Speed, nous avons mis au point un cours de formation de trois demi-journées pour identifier une CXR normale, une CXR de bonne qualité et six caractéristiques suggestives de la TB. Nous avons effectué une évaluation avant et après la formation sur un ensemble prédéfini de 20 clichés radiologiques. Nous avons comparé la proportion de CXR correctement interprétées et le score médian de lecture avant et après la formation à l'aide du test de McNemar et d'un modèle linéaire mixte. RÉSULTATS: Sur les 191 HCWs, 43 (23%) étaient des médecins, 103 (54%) des infirmières, 18 (9,4%) des techniciens en radiologie et 12 (6,3%) d'autres professionnels. Sur 2 840 CXR avec les deux évaluations, respectivement 1 843 (64,9%) et 2 277 (80,2%) ont été correctement interprétées avant et après la formation (P < 0,001). Le score médian de lecture s'est amélioré de manière significative, passant de 13/20 à 16/20 après la formation, après ajustement par pays, établissement et profession (ß ajusté = 3,31; IC 95% 2,44­4,47). CONCLUSION: Malgré certaines limites de l'évaluation du cours qui n'incluait pas de CXR anormale non évocatrice de TB, les résultats de l'étude suggèrent qu'une formation courte sur la CXR pourrait améliorer les compétences d'interprétation des HCWs dans le diagnostic de la TB pédiatrique.

Use of stool swabs in molecular transport media increases access to Xpert Ultra testing for TB in children.

SETTING: Tertiary level hospital in Lusaka, Zambia.OBJECTIVE: To measure concordance between Xpert® MTB/RIF Ultra (Ultra) results of stool with and without transport media, and compare Ultra results from the two stool processing methods to Ultra and culture results using gastric aspirates (GA).DESIGN: This was a cross-sectional study collecting stool and GA from children 0-5 years presenting with signs and symptoms of TB. Stool was processed for Ultra testing by two methods: the Simple-One-Step (SOS) on an aliquot of stool and PrimeStore® MTM Molecular Transport Medium (PS-MTM) using a stool swab.RESULTS: A total of 114 children (median age: 17 months, IQR 7-30) provided both a stool and a GA sample. Stool Ultra results processed using the PS-MTM method showed high concordance with stool Ultra results processed by the SOS method, with only 1/114 discordant results. Concordance with GA Ultra was high as well, as 9/13 Mycobacterium tuberculosis (MTB) cases detected were identified by all three methods.CONCLUSION: Ultra results from stool swabs collected using PS-MTM were equivalent to results from stool using the SOS method and GA. Given that PS-MTM inactivates MTB and stabilises DNA without cold chain, using it for stool has the potential to increase access to a TB diagnosis for children in underserved areas.

Clinical standards for drug-susceptible TB in children and adolescents.

BACKGROUND: These clinical standards aim to provide guidance for diagnosis, treatment, and management of drug-susceptible TB in children and adolescents.METHODS: Fifty-two global experts in paediatric TB participated in a Delphi consensus process. After eight rounds of revisions, 51/52 (98%) participants endorsed the final document.RESULTS: Eight standards were identified: Standard 1, Age and developmental stage are critical considerations in the assessment and management of TB; Standard 2, Children and adolescents with symptoms and signs of TB disease should undergo prompt evaluation, and diagnosis and treatment initiation should not depend on microbiological confirmation; Standard 3, Treatment initiation is particularly urgent in children and adolescents with presumptive TB meningitis and disseminated (miliary) TB; Standard 4, Children and adolescents should be treated with an appropriate weight-based regimen; Standard 5, Treating TB infection (TBI) is important to prevent disease; Standard 6, Children and adolescents should receive home-based/community-based treatment support whenever possible; Standard 7, Children, adolescents, and their families should be provided age-appropriate support to optimise engagement in care and clinical outcomes; and Standard 8, Case reporting and contact tracing should be conducted for each child and adolescent.CONCLUSION: These consensus-based clinical standards, which should be adapted to local contexts, will improve the care of children and adolescents affected by TB.

Missed opportunities for screening child contacts of smear-positive tuberculosis in Zambia, a high-prevalence setting.

OBJECTIVE: To evaluate whether contact screening recommendations for child household contacts of adult smear-positive tuberculosis (TB) cases were implemented in Lusaka, Zambia. METHODS: A cross-sectional survey of smear-positive adults receiving anti-tuberculosis treatment was conducted. The main outcomes were proportions of TB patients with under-five children who were aware, informed and/or had a child screened and/or commenced on isoniazid (INH). RESULTS: Of 371 TB patients (median age 33 years, 70% males), 259 (70%) lived with a child aged <15 years, of whom 48% (177) were aged <5 years. Overall, 32% (n = 119) were aware about child contact screening; 49% were informed by community agents vs. 38% by health care providers. Of the 259 TB patients with children, 32% (n = 84) were aware of contact screening, 32% (56/177) of whom had children aged <5 years. Of the 92/259 (36%) who were asked to have their children screened by the health care provider, 19% (49) complied. Of 177 eligible children, 11% (n = 20) were commenced on INH. Patients were more likely to comply when informed by the health care provider vs. the community agent. CONCLUSION: Screening of child contacts of adult smear-positive TB patients in areas with a large burden of adult disease is not routinely implemented. Interventions are required to ensure compliance with contact screening recommendations.

Improved Adherence to Antiretroviral Therapy Observed Among HIV-Infected Children Whose Caregivers had Positive Beliefs in Medicine in Sub-Saharan Africa.

A high level of adherence to antiretroviral treatment is essential for optimal clinical outcomes in HIV infection, but measuring adherence is difficult. We investigated whether responses to a questionnaire eliciting caregiver beliefs in medicines were associated with adherence of their child (median age 2.8 years), and whether this in turn was associated with viral suppression. We used the validated beliefs in medicine questionnaire (BMQ) to measure caregiver beliefs, and medication event monitoring system caps to measure adherence. We found significant associations between BMQ scores and adherence, and between adherence and viral suppression. Among children initiating Antiretroviral therapy (ART), we also found significant associations between BMQ 'necessity' scores, and BMQ 'necessity-concerns' scores, and later viral suppression. This suggests that the BMQ may be a valuable tool when used alongside other adherence measures, and that it remains important to keep caregivers well informed about the long-term necessity of their child's ART.