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Full-Text Articles in Bacterial Infections and Mycoses

Chloroquine-Susceptible And -Resistant Plasmodium Falciparum Strains Survive High Chloroquine Concentrations By Becoming Dormant But Are Eliminated By Prolonged Exposure, Johan Ursing, Rasmus Johns, Berit Aydin-Schmidt, Carla Calçada, Poul-Erik Kofoed, Najia Karim Ghanchi, Maria Isabel Veiga, Lars Rombo Mar 2022

Chloroquine-Susceptible And -Resistant Plasmodium Falciparum Strains Survive High Chloroquine Concentrations By Becoming Dormant But Are Eliminated By Prolonged Exposure, Johan Ursing, Rasmus Johns, Berit Aydin-Schmidt, Carla Calçada, Poul-Erik Kofoed, Najia Karim Ghanchi, Maria Isabel Veiga, Lars Rombo

Department of Pathology and Laboratory Medicine

Background: Plasmodium falciparum strains that are resistant to standard-dose chloroquine can be treated by higher chloroquine concentrations maintained for a longer time in vivo.
Objectives: To determine the relative importance of chloroquine concentrations versus exposure time for elimination of chloroquine-susceptible and -resistant P. falciparum in vitro.
Methods: Chloroquine-susceptible (3D7) and -resistant (FCR3) strains were exposed in vitro to 1, 2, 4, 8, 16 or 32 times their respective 90% inhibitory chloroquine concentrations for 3, 5, 7 or 14 days and then followed until recrudescence, or not, by 42 days after the end of exposure.
Results: Exposure to chloroquine appeared to …


Plasmodium Impairs Antibacterial Innate Immunity To Systemic Infections In Part Through Hemozoin-Bound Bioactive Molecules., Christopher Lynn Harding Aug 2020

Plasmodium Impairs Antibacterial Innate Immunity To Systemic Infections In Part Through Hemozoin-Bound Bioactive Molecules., Christopher Lynn Harding

Electronic Theses and Dissertations

Despite efforts to decrease the global health burden of malaria, infections with Plasmodium species continue to cause over 200 million episodes of malaria each year which resulted in 405,000 deaths in 2018 [1]. One complication of malaria is increased susceptibility to invasive bacterial infections. Plasmodium infections impair host immunity to non-Typhoid Salmonella (NTS) through activities of heme oxygenase I (HO-I) )-induced release of immature granulocytes and myeloid cell-derived IL-10. Yet, it is not known if these mechanisms are specific to NTS. We show here, that Plasmodium yoelii 17XNL (Py) infected mice had impaired clearance of systemic Listeria monocytogenes (Lm) during …