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Infant/child rapid serology tests fail to reliably assess HIV exposure among sick hospitalized infants.

ABSTRACT: BACKGROUND:The WHO guidelines for infant and child HIV diagnosis recommend the use of maternal serology to determine child exposure status in ages 0-18 months, but suggest that infant serology can reliably be used to determine exposure for those less than 4 months. There is little evidence about the performance of these recommendations among hospitalized sick infants and children. METHODS:Within a clinical trial (NCT02063880) in Kenya, among children 18 months or younger, maternal and child rapid serologic HIV tests were performed in tandem. Dried blood spots were tested using HIV DNA PCR for all children whose mothers were seropositive, irrespective of child serostatus. We characterized the performance of infant/child serology results to detect HIV exposure in three age groups: 0-3, 4-8, and 9-18 months. RESULTS:Among 65 maternal serology positive infants age 0-3 months, 48 (74%), 1 (2%) and 16 (25%) had positive, indeterminate and negative infant serology results, respectively. Twelve (25%), 0 and 4 (25%) of those with positive, indeterminate and negative infant serology results, respectively, were HIV-infected by DNA PCR. Among 71 maternal serology positive infants age 4-8 months, 31 (44%), 8 (11%) and 32 (45%) had positive, indeterminate and negative infant serology results, respectively. Fourteen (45%), 2 (25%) and 7 (22%) infants with positive, indeterminate and negative infant serology results, respectively, were HIV-infected. Among 67 maternal serology positive infants/children age 9-18 months, 40 (60%), 2 (3%) and 25 (37%) had positive, indeterminate and negative infant serology results, respectively. Thirty-six (90%), 2 (100%) and 2 (8%) infants with positive, indeterminate and negative infant serology results, respectively, were HIV-infected. In the 0-3, 4-8 and 9-18 month age groups, use of maternal serology to define HIV exposure identified 33% [95% confidence interval (CI) 10-65%], 44% (95% CI 20-70%) and 5% (95% CI 0.1-18%) more HIV infections, respectively. CONCLUSION:Maternal serology should preferentially be used for screening among hospitalized infants of all ages to improve early diagnosis of children with HIV.

SUBMITTER: Wagner AD

PROVIDER: S-EPMC5540651 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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Infant/child rapid serology tests fail to reliably assess HIV exposure among sick hospitalized infants.

Wagner Anjuli D AD Njuguna Irene N IN Andere Ruth A RA Cranmer Lisa M LM Okinyi Helen M HM Benki-Nugent Sarah S Chohan Bhavna H BH Maleche-Obimbo Elizabeth E Wamalwa Dalton C DC John-Stewart Grace C GC

AIDS (London, England) 20170701 11

<h4>Background</h4>The WHO guidelines for infant and child HIV diagnosis recommend the use of maternal serology to determine child exposure status in ages 0-18 months, but suggest that infant serology can reliably be used to determine exposure for those less than 4 months. There is little evidence about the performance of these recommendations among hospitalized sick infants and children.<h4>Methods</h4>Within a clinical trial (NCT02063880) in Kenya, among children 18 months or younger, maternal ...[more]

PMID: 28609404

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Project description:BACKGROUND:Community health worker (CHW) interventions to manage childhood illness is a strategy promoted by the global health community which involves training and supporting CHW to assess, classify and treat sick children at home, using an algorithm adapted from the Integrated Management of Childhood Illness (IMCI). To inform CHW policy, the Government of Tanzania launched a program in 2011 to determine if community case management (CCM) of malaria, pneumonia and diarrhea could be implemented by CHW in that country. METHODS:This paper reports the results of an observational study on the CCM service delivery quality of a trial cohort of CHW in Tanzania, called WAJA. In 2014, teams of data collectors, employees of the Ministry of Health and Social Welfare trained in IMCI, assessed the IMCI skills rendered by a sample of WAJA on sick children who presented to WAJA with illness signs and symptoms in their communities. The assessment included direct observations of WAJA IMCI episodes and expert re-assessment of the same children seen by WAJA to assess the congruence between the assessment, classification and treatment outcomes of WAJA cases and those from cases conducted by expert re-assessors. RESULTS:In the majority of cases, WAJA correctly assess sick children for CCM-treatable illnesses (malaria, pneumonia, and diarrhea) and general danger signs (90% and 89%, respectively), but too few correctly assess for physical danger signs (39%); on classification in the majority of cases (73%) WAJA correctly classified illness, though more for CCM-treatable illnesses (83%). In majority of cases (78%) WAJA treated children correctly (84% of malaria, 74% pneumonia, and 71% diarrhea cases). Errors were often associated with lapses in health systems support, mainly supervision and logistics. CONCLUSION:CCM is a feasible strategy for CHW in Tanzania, who, in the majority of cases, implemented the approach as well as IMCI expert re-assessors. Nevertheless, for CCM to be effective, in Tanzania, a strategy to implement it must be coordinated with efforts to strengthen local health systems.

Project description:BackgroundAs community case management of childhood illness expands in low-income countries, there is a need to assess the quality of care provided by community health workers. This study had the following objectives: 1) examine methods of recruitment of sick children for assessment of quality of care, 2) assess the validity of register review (RR) and direct observation only (DO) compared to direct observation with re-examination (DO+RE), and 3) assess the effect of observation on community health worker performance.MethodsWe conducted a survey to assess the quality of care provided by Ethiopian Health Extension Workers (HEWs). The sample of children was obtained through spontaneous consultation, HEW mobilization, or recruitment by the survey team. We assessed patient characteristics by recruitment method. Estimates of indicators of quality of care obtained using RR and DO were compared to gold standard estimates obtained through DO+RE. Sensitivity, specificity, and the area under receiver operator characteristic curve (AUC) were calculated to assess the validity of RR and DO. To assess the Hawthorne effect, we compared estimates from RR for children who were observed by the survey team to estimates from RR for children who were not observed by the survey team.ResultsParticipants included 137 HEWs and 257 sick children in 103 health posts, plus 544 children from patient registers. Children mobilized by HEWs had the highest proportion of severe illness (27%). Indicators of quality of care from RR and DO had high sensitivity for most indicators, but specificity was low. The AUC for different indicators from RR ranged from 0.47 to 0.76, with only one indicator above 0.75. The AUC of indicators from DO ranged from 0.54 to 1.0, with three indicators above 0.75. The differences between estimates of correct care for observed versus not observed children were small.ConclusionsMobilization by HEWs and recruitment by the survey teams were feasible, but potentially biased, methods of obtaining sick children. Register review and DO underestimated performance errors. Our data suggest that being observed had only a small positive effect on the performance of HEWs.

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Infant/child rapid serology tests fail to reliably assess HIV exposure among sick hospitalized infants.

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Infant/child rapid serology tests fail to reliably assess HIV exposure among sick hospitalized infants.

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