Evidence map›Paper›PMID 33089360›Full record

ArticleParasitology research2020

Plasmodium falciparum parasites exit the infected erythrocyte after haemolysis with saponin and streptolysin O.

Katharina A Quadt, Xanthoula Smyrnakou, Friedrich Frischknecht, Guido Böse, Markus Ganter

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Article in Parasitology research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Selective targeting ofAntimicrobial agents and chemotherapy · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Katharina A QuadtZendia GmbH, Rummler 5, 48324, Sendenhorst, Germany.
Xanthoula SmyrnakouZendia GmbH, Rummler 5, 48324, Sendenhorst, Germany.
Friedrich FrischknechtIntegrative Parasitology, Centre for Infectious Diseases, Heidelberg University Hospital, Im Neuenheimer Feld 324, 69120, Heidelberg, Germany.ORCID https://orcid.org/0000-0002-8332-6668
Guido BöseZendia GmbH, Rummler 5, 48324, Sendenhorst, Germany. guido.boese@zendia.eu.
Markus GanterZendia GmbH, Rummler 5, 48324, Sendenhorst, Germany. markus.ganter@med.uni-heidelberg.de.ORCID https://orcid.org/0000-0003-0684-2260

Funding

Bundesministerium für Bildung und Forschung (DE) 13GW0065ABundesministerium für Bildung und Forschung (DE) BIO 326-036
6 · The paper itself

Abstract

Malaria is caused by unicellular parasites of the genus Plasmodium, which reside in erythrocytes during the clinically relevant stage of infection. To separate parasite from host cell material, haemolytic agents such as saponin are widely used. Previous electron microscopy studies on saponin-treated parasites reported both, parasites enclosed by the erythrocyte membrane and liberated from the host cell. These ambiguous reports prompted us to investigate haemolysis by live-cell time-lapse microscopy. Using either saponin or streptolysin O to lyse Plasmodium falciparum-infected erythrocytes, we found that ring-stage parasites efficiently exit the erythrocyte upon haemolysis. For late-stage parasites, we found that only approximately half were freed, supporting the previous electron microscopy studies. Immunofluorescence imaging indicated that freed parasites were surrounded by the parasitophorous vacuolar membrane. These results may be of interest for future work using haemolytic agents to enrich for parasite material.

Indexed as

Bacterial ProteinsErythrocyte MembraneErythrocytesExtracellular VesiclesHemolysisHumansLife Cycle StagesMicroscopyPlasmodium falciparumSaponinsStreptolysinsBacterial ProteinsSaponinsstreptolysin OStreptolysinsHaemolysisPlasmodium falciparumSaponinStreptolysin O

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.