Malaria Incidence and Rates

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Annual Parasite Incidence (API)

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Annual Parasite Incidence (API) formula: API = (Number of confirmed malaria cases during one year / Population under surveillance) × 1000

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ABER

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Annual Blood Examination Rate (ABER) formula: ABER = (Number of blood slides examined for malarial parasite in a year / Population under surveillance) × 100

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AFI

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Annual Falciparum Incidence (AFI) formula: AFI = (Number of confirmed P. falciparum malaria cases during one year / Population under surveillance) × 1000

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SPR

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Slide Positivity Rate (SPR) formula: SPR = (Total number of blood smears positive for malarial parasite / Total number of slides examined) × 100

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SFR

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Slide Falciparum Rate (SFR) formula: SFR = (Total number of blood smears positive for P. falciparum / Total number of slides examined) × 100

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Percentage of malaria cases caused by P. falciparum.

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Percentage of Falciparum Cases = (Total number of blood smears positive for P. falciparum / Total number of blood smears positive for malaria parasite) × 100

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CFR

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Case Fatality Rate (CFR) formula: CFR = (Total number of deaths due to malaria / Total number of malaria cases) × 100

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Specific Death Rate due to Malaria(SDR)

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Specific Death Rate due to Malaria (SDR) formula: SDR = (Total number of deaths due to malaria / Mid-year population) × 1000

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Microfilarial Rate (MFR)

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Filarial Disease Rate (FDR)

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