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Related Concept Videos

Malaria01:29

Malaria

Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...
Clearance Models: Compartment Models01:25

Clearance Models: Compartment Models

Clearance measures drug elimination from the central compartment, including plasma and highly perfused organs like kidneys and liver. Its calculation varies depending on pharmacokinetic models and administration routes. The one-compartment model, for instance, portrays the pharmacokinetics of polar drugs such as aminoglycoside antibiotics administered intravenously and readily excreted in urine. In this case, clearance is influenced by the terminal rate constant (λz) and the total volume of...
Clearance Models: Noncompartmental Models01:17

Clearance Models: Noncompartmental Models

Clearance is a pharmacokinetic parameter traditionally defined by compartment models, signifying the rate at which a drug is expelled from the body. However, a noncompartmental model offers an alternative method for assessing clearance, primarily employing empirical data obtained after administering a single drug dose.
The noncompartmental approach capitalizes on extensive sampling data, correlating the volume of distribution to systemic exposure and the administered dosage. This method enables...
Drug Elimination: The Concept of Clearance01:06

Drug Elimination: The Concept of Clearance

Drug elimination refers to removing drugs from the body, either through urine by the kidneys or through bile by the liver. Drug clearance is a pharmacokinetic parameter that measures the efficiency of drug removal from the bloodstream within a specific time frame. It is calculated as the rate at which a drug is eliminated from plasma divided by the plasma concentration of the drug.
Drug clearance is not limited to renal excretion but encompasses all organs involved in drug elimination,...
Elimination Kinetics: First-Order and Zero-Order01:05

Elimination Kinetics: First-Order and Zero-Order

Eliminating drugs from the body is a vital process that occurs through excretion or metabolism. Understanding the kinetics of drug elimination is crucial for drug development, dosage determination, and optimizing patient outcomes.
Drug clearance depends on the rate of drug elimination and its plasma concentration. Another important parameter is a drug's half-life, which is the time required for its concentration to decrease by half. In most cases, drug clearance follows first-order kinetics,...
Kinetics of Drug Elimination01:17

Kinetics of Drug Elimination

Eliminating drugs from the body is a vital process that occurs through excretion or metabolism. Understanding the kinetics of drug elimination is crucial for drug development, dosage determination, and optimizing patient outcomes.
Drug clearance depends on the rate of drug elimination and its plasma concentration. Another important parameter is the half-life of a drug, which is the time required for its concentration to decrease by half. In most cases, drug clearance follows first-order...

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Related Experiment Video

Updated: May 29, 2026

Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages
08:23

Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages

Published on: May 30, 2019

The parasite clearance curve.

N J White1

  • 1Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand. nickw@tropmedres.ac

Malaria Journal
|September 24, 2011
PubMed
Summary
This summary is machine-generated.

Parasite clearance rates are key to evaluating antimalarial drug effectiveness, especially for artemisinin resistance. The study reviews factors influencing clearance and discusses analysis methods for therapeutic assessment.

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Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages
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Area of Science:

  • Malariology
  • Pharmacology
  • Parasitic Diseases

Background:

  • Parasite clearance rates are crucial indicators of antimalarial drug efficacy.
  • These rates are particularly vital for detecting and assessing artemisinin resistance.
  • Understanding clearance dynamics aids in optimizing malaria treatment strategies.

Purpose of the Study:

  • To review factors influencing parasite clearance rates.
  • To discuss methods for presenting and analyzing parasite clearance data.
  • To highlight the significance of the log-linear segment for therapeutic assessment.

Main Methods:

  • Review of existing literature on parasite clearance.
  • Discussion of various data presentation techniques.
  • Exploration of analytical approaches for clearance curves.

Main Results:

  • The slope of the log-linear segment of the parasite clearance curve exhibits minimal inter-individual variance.
  • This segment is identified as the most reliable focus for therapeutic assessment.
  • Various factors influencing clearance rates were identified and reviewed.

Conclusions:

  • Parasite clearance rate analysis, particularly the log-linear slope, is essential for evaluating antimalarial drugs.
  • Accurate assessment of artemisinin resistance relies on robust clearance rate analysis.
  • Standardized methods for presentation and analysis are recommended for reliable therapeutic evaluation.