Peripheral Microscopic Localization of Plasmodium falciparum Garnham Body in an Immature Stage-III Gametocyte in Fatal Cerebral Malaria
Bibliographic record
Abstract
Immature gametocytes of Plasmodium falciparum ( P. falciparum ) are localized in the bone marrow and spleen for their development. Upon maturation, these immature gametocytes release to the peripheral circulation for sporogony and subsequent reproductive phases which leads to malaria transmission. Garnham (G) bodies are curious structures seen rarely inside immature gametocytes and never reported in malarial literature after their first identification by Garnham in 1933 from Kenya in a fatal malaria case. Here, a case of fatal malaria from India is reported for the first time, with the demonstration of peripheral microscopic localization of P. falciparum G body present inside an immature gametocyte. A 23-year-old male patient died of cerebral malaria and multi-organ dysfunction within 19 h of hospitalization to a tertiary care hospital. Examination of his peripheral blood on admission using Giemsa-stained light microscopy followed by differential interference contrast imaging in a confocal microscope revealed presence of a G body inside an immature, stage-III gametocyte of P. falciparum . The patient was diagnosed to have cerebral malaria along with jaundice and acute renal failure, and had received antimalarial artesunate along with other therapies and intensive care. Microscopic localization of P. falciparum G body inside immature gametocyte (stage-III) especially in peripheral human circulation, is an extremely rare observation in clinical malaria, only second to Garnham’s discovery since 1933. It portrays a peculiar phenomenon in the malaria parasite’s life cycle that may derive newer avenues for exploring the genetics underlying the “trade-offs” of immature and mature gametocytes, prospects for transmission-blocking drug discovery and vaccine design strategies. Clin Infect Immun. 2019;4(2):27-30 doi: https://doi.org/10.14740/cii62w
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".