Performance of BIOCREDIT Pf/Pv lactate dehydrogenase-based malaria rapid diagnostic test among pregnant women with suspected malaria infection in Bahir Dar City Administration, northwest Ethiopia
Bibliographic record
Abstract
BACKGROUND: Malaria during pregnancy is a common public health problem in sub-Saharan Africa. It poses a double burden as it affects the health of mothers, their fetuses and neonates. Moreover, due to malaria parasites sequestration in the placenta, microscopy might miss infections. Hence, rapid diagnostic tests (RDTs) are good alternatives for diagnosing malaria in pregnancy even at health facilities or periphery or lower-level healthcare facilities (e.g., health posts). However, performance of RDTs should be closely monitored as their sensitivity and specificity are affected by many factors. METHODS: A health facility-based cross-sectional study was conducted among 302 pregnant women with suspected malaria infection to evaluate the performance of the newly introduced BIOCREDIT Pf/Pv plasmodial lactate dehydrogenase (pLDH) RDT. Venous blood samples were collected from all eligible pregnant women and tested for Plasmodium infection using BIOCREDIT Pf/Pv and CareStart™ Pf/Pv RDTs, microscopy and polymerase chain reaction (PCR) following standard protocols. The performance of BIOCREDIT Pf/Pv was evaluated using the following parameters: sensitivity, specificity, positive and negative predictive values and kappa-value. These parameters were calculated using online SISA software. RESULTS: Of the 302 pregnant women with complete data, 166 (55.0%), 180 (59.6%), 191 (63.2%) and 207 (68.5%) tested positive by CareStart™ Pf/Pv, BIOCREDIT Pf/Pv, microscopy and PCR, respectively. The sensitivity of BIOCREDIT Pf/Pv in detecting P. falciparum was 89.4%, 75.4% and 55.6% as compared to CareStart™ Pf/Pv, microscopy and PCR tests, respectively, while the sensitivity for P. vivax was 81.8%, 84.3% and 86.7%, respectively. The specificity of BIOCREDIT Pf/Pv was > 90% when compared to all the three diagnostic tests. When considering PCR as a reference test, BIOCREDIT Pf/Pv was more sensitive (55.6%) than CareStart™ Pf/Pv (37.6%) for detecting P. falciparum but had similar sensitivity (86.7%) in detecting P. vivax. CONCLUSIONS: BIOCREDIT Pf/Pv performed better for the diagnosis of P. falciparum infection in pregnant women than the previously in-use CareStart™ Pf/Pv. We recommend using the BIOCREDIT Pf/Pv RDT in Ethiopia for the diagnosis of both species given the high prevalence and widespread nature of the hrp2/3 gene deletion in the country.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".