Malaria: The Ancient Deadly Disease By: Allen Bowman & Sandra Fridlund What is Malaria? Infection spread by the Anapheles mosquito Mosquito bite causes parasite to get into your blood stream Parasite lays eggs in blood stream 4 known species: Plasmodium falciparum (most deadliest) P. Vivex P. Ovale Where is Malaria? At least 90 countries in Africa, Asia, the Caribbean, and Central and South America are considered malarious Leading cause of death worldwide 300-500 million people infected each year 2 million die each year History – 2700 BCE – 340 CE China – Nei Ching – medical writings – Anti fever properties of Quinhao known as artemisinin Greece – 4th century BC – recognized a decrease in population due to a disease. – Pericles era(495-429) – sanskrit medical writings of insect bites causing death. Rome – Malaria disease in swamps History: Early 17th Century Spanish learned of medical bark from Quinquina calisaya Discoveries 1800: Discovery of the Malaria Parasite by Charles Louis Alphonse Laveran – Noticed parasites in blood – Species name: Oscillaria malariae Differential species – Camillo Golgi Tertian periodicity (fever every other day) Quartan periodicity (fever every 3rd day) Malaria Naming Quivanni Batista Grassi and Raimondo Filetti (1890): Plasmodium vivax and P. malariae William Welch (1897): – P. falciparium (tertian malaria parasite) – Took over Laverans name of Oscillaria malaria Malaria Naming John William Watson Stephens (1922): 4th human malaria parasite (P. ovale) Malaria Control 1942 – 1945: Southern United States had problematic areas 1946 – present: CDC focused on prevention, surveillance and technical support internationally 1950’s: US was eradicated from malaria Malaria Control 1955 – 1978: Eradication in temperate climate areas – India and Sir Lanka Huge increase of eradication in these areas, but fell quickly with major infections of malaria Negligible progress in Indonesia, Afghanistan, Haiti, and Nicaragua Excluded efforts from sub Saharan Africa Prevention Protection from malaria: – Keep from getting mosquito bites – Sleep in a room with screens – Use insect repellent that contains no more than 35% of deet – Wear long sleeves and light colored clothes – Do not go outside after sunset Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – Cloroquine: 4-aminoquinoline that inhibits the heme polymerase and prevents the coversion of heme Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – Mefloquine (standard): derived of methanal Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – Proguanil (aka chloroguanide hydrochloride): manufactured in Great Britian and unavailable in the U.S. Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – Doxycycline: attacks the preerythrocytic phase which occurs in the liver and the erythrocytic phase of the Plasmodium life cycle through ribosomal inhibition Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – Primaquine: reserved for people who travel for extensive periods of time – Before primaquine therapy is initiated, the possibility of glucose-6-phosphate dehydrogenase defidiciency must be excluded Medications Known as Prophylactics, must be taken weeks before leaving to a malaria infested country and weeks after returning home – If present, this deficiency can result in severe hemolytic anemia in persons taking Primaquine Malaria Symptoms Fever Headache and Muscle pain Fatigue Chills Sweats Nausea and Vomiting Dry cough Malaria Symptoms Severity depends on individual’s health and immune system AND the infecting parasite Incubation Range for symptoms to show: – Plasmodium falciparum: 7 to 14 days – P. vivax: 8 to 18 days – P. ovale: 8 to 18 days – P. malariae: 7 to 40 days Malaria Symptoms http://www.cdfound.to.it/hTML/pf24.h tm Malaria Life Cycle Malaria Life Cycle http://wwwermm.cbcu.cam.ac.uk/dcn/swf001dcn. htm Diagnostic Tests for Malaria Blood smear – Number and shape of blood cells – Checks morphology of RBCs DNA probe Immunoassay Malaria: The Ancient Deadly Disease