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Malaria – Protozoa (Hematologic Infection)

by Vincent Racaniello, PhD

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    00:00 Some of the symptoms of malaria include fever and paroxysms of shaking chills and of course anemia, as the parasites multiply in red blood cells and destroy them. The paroxysms coincides with lysis of red blood cells, which of course is done to release the mereozoites.

    00:21 This causes the production of cytokines and the waves of fever so characteristic of the disease. Sometime the replication of the parasites within the blood cell is synchronized, so remember your body is full of many, many red blood cells, many of them can be infected with malaria parasites, and they can all mature at the same time and rupture at the same time in cycles, and a characteristic feature of malaria is these bouts of fever that occur in cycles, as all these red blood cells burst at more or less the same time. Other organs may also be involved in malaria besides the liver and the red blood cells, and this can result in hemolysis, which leads to icterus and jaundice, effects on the liver, an enlarged spleen, particularly as a consequence of trapping of infected red blood cells. Now normally a red blood cell is very deformable and it can move through tight spaces like capillaries and organs very readily. But when they are infected with malaria parasites they become less deformable, they get trapped in organs with small capillaries like the spleen and that causes disease.

    01:39 Now the four different species of malaria that I mentioned to you at the beginning of our talk differ in their virulence. All four of them are shown in their blood forms here.

    01:52 And depending on where you are what you get infected, you can have a somewhat different outcome. The long-term effects of repeated infections, which can happen because immunity is not protective, you may have learning deficits, reduced growth rate and in pregnant women, can lead to spontaneous abortion. So this is one of the tragedies of malaria in kids, young kids, who get repeatedly infected over and over, they feel miserable for months at a time, they can't learn properly and they can't go on to be productive adults in society.


    About the Lecture

    The lecture Malaria – Protozoa (Hematologic Infection) by Vincent Racaniello, PhD is from the course Parasites.


    Included Quiz Questions

    1. Plasmodium sporozyte
    2. Plasmodium falciparum
    3. Pladmodium vivax
    4. Plasmodium malariae
    5. Plasmodium ovale
    1. Chlordiazepoxide
    2. Mefloquine
    3. Malarone
    4. Quinine
    5. Halofantrine
    1. An anti-malarial vaccine
    2. Wearing insect repellent on the body during the day
    3. Having a mosquito net over the bed at night
    4. Covering the body with clothing
    5. Putting screens in windows
    1. It is transmitted among humans by the bite of an infected female Anopheles mosquito
    2. There are animal variants of malaria and the can cause human disease
    3. There are three different strains of human malaria parasites
    4. The use of the artemisin drug type over many years led to extensive resistance, so it is no longer useful
    5. A window screen does not cut down on likelihood of contracting malaria
    1. Red blood cells
    2. Lymphocytes
    3. Natural killer cells
    4. Macrophages
    5. Platelets
    1. Entrapment of RBCs
    2. Increase in growth hormone levels
    3. Increase in production of RBCs
    4. Abnormal tissue repair
    5. Increase in blood pressure due to low RBCs levels
    1. Giemsa stain
    2. Methyl blue
    3. Haematoxylin and eosin
    4. Methenamine silver
    5. Ziehl-Neelsen stain
    1. 1 to 15 and 27 to 30
    2. 1 to 15
    3. 27 to 30
    4. 1 to 30
    5. 1 to 17
    1. It blocks heme detoxification in red blood cells
    2. It blocks H2O2 production
    3. It blocks the G6PD enzyme
    4. It acts as a precursor of Glutathione
    5. It blocks dihydrofolate reductase
    1. Iron
    2. Haem
    3. Globulin
    4. Mitochondria
    5. Cell adhesion glycoproteins
    1. Bed nets
    2. UV night lamps
    3. Infrared night lamps
    4. Methotrexate as prophylaxis
    5. Primaquine as prophylaxis
    1. Window screens
    2. Giving primaquine as prophylaxis to the family
    3. By giving sulfamethizole as prophylaxis to the family
    4. By spraying parathion
    5. By spraying malathion
    1. 4
    2. 2
    3. 3
    4. 5
    5. 6
    1. Female Anopheles mosquito
    2. Male Anopheles mosquito
    3. Sporothrix Schenckii
    4. Ixodes Scapularis
    5. Mansonia Mosquito

    Author of lecture Malaria – Protozoa (Hematologic Infection)

     Vincent Racaniello, PhD

    Vincent Racaniello, PhD


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    good teachinig skills
    By Neuer N. on 31. October 2017 for Malaria – Protozoa (Hematologic Infection)

    the lecturer is very good in lecturing, i understand very well morethan in the class hall