Biology · General Awareness

Disease Vectors and Pathogens

820 Questions

Disease vectors and pathogens examine how organisms like Plasmodium and Leishmania transmit infections. Test items require matching vectors to specific diseases. Studying these life cycles is essential for scoring well.

Plasmodium infective stagesDisease transmission modesDisease vectors and fleasIntracellular parasitesElephantiasis causes

Disease Vectors and Pathogens Questions

Multiple choice

Trypanosoma cruzi is the causative agent of

  1. hydatid disease

  2. chagas disease

  3. African trypansomiasis

  4. pediculosis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chagas disease, also known as American trypanosomiasis, is a tropical parasitic disease caused by the protozoan Trypanosoma cruzi.

Multiple choice

Which of the following is the causative organism of amoebic dysentery?

  1. Entamoeba gingivalis

  2. Entamoeba invadens

  3. Entamoeba histolytica

  4. Entamoeba polecki
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Entamoeba histolytica causes amoebic dysentery in humans. Amoebic dysentery is transmitted through contaminated food and water. In this, the stools are foul smelling, often acccompanied by blood and mucus.

Multiple choice

Where do schistosomes reside?

  1. Intestine

  2. Stomach

  3. Blood vessels

  4. Liver
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Schistosomes reside in visceral blood vessels and thus, are commonly known as blood flukes.

Multiple choice

Match the following ||| |---|---| |Organism|Disease| |1. Wuchereria bancrofti|a. Coneurosis| |2. Guinea worm|b. Liver infection| |3. Fascicola hepatica|c. Dracunculiasis| |4. T. serialis|d. Filariasis |
  1. 1. Wuchereria bancrofti b. Liver infection
    2. Guinea worm a. Coneurosis
    3. Fascicola hepatica c. Dracunculiasis
    4. T. serialis d. Filariasis
  2. 1. Wuchereria bancrofti c. Dracunculiasis
    2. Guinea worm b. Liver infecion
    3. Fascicola hepatica a. Coneurosis
    4. T. serialis d. Filariasis
  3. 1. Wuchereria bancrofti a. Coneurosis
    2. Guinea worm b. Liver infection
    3. Fascicola hepatica c. Dracunculiasis
    4.T. serialis d. Filariasis
  4. 1. Wuchereria bancrofti d. Filariasis
    2. Guinea worm c. Dracunculiasis
    3. Fascicola hepatica b. Liver infection
    4. T. serialis a. Coneurosis
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is a correct match. Wuchereria bancrofti causes Filariasis; Guinea worm infection causes Dracunculiasis; Fascicola hepatica causes liver infection and T. serialis causes Coneurosis.

Multiple choice

Which of the following causes Schuffner’s dots observed in erythrocytes?

  1. Giardiasis

  2. Filariasis

  3. Malaria

  4. Kala-azar

  5. Laryngitis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Schüffner's dots refers to a hematological finding that is associated with malaria, exclusively found in Plasmodium ovale and Plasmodium vivax. Plasmodium vivax induces morphologic alterations in infected host erythrocytes that are visible by light microscopy in Romanovsky-stained blood smears as multiple brick-red dots.

Multiple choice

Trypanosomes infect a variety of hosts and cause various diseases, including the fatal human disease Chagas. Which among the following Trypanosoma species has been proposed for use in the prevention of Chagas disease?

  1. Trypanosoma cruzi

  2. Trypanosoma brucei

  3. Trypanosoma irwini

  4. Trypanosoma suis

  5. Trypanosoma rangeli

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Trypanosoma rangeli is considered nonpathogenic in humans. It has been proposed for use in the prevention of Chagas disease.

Multiple choice

After complete check up and blood tests doctor told a couple that their daughter is suffering from a Leishmania species infection which infects the mononuclear phagocyte system including spleen, liver and bone marrow. Which among the following species the doctor must be reffering to?

  1. Leishmania aethiopica

  2. Leishmania donovani

  3. Leishmania infantum

  4. Leishmania tropica

  5. Leishmania mexicana

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Leishmania donovani is a human blood parasite responsible for visceral leishmaniasis or kala-azar, the most severe form of leishmaniasis. It infects the mononuclear phagocyte system including spleen, liver and bone marrow.

Multiple choice

Birds host which of the following Plasmodium species?

  1. Plasmodium coatneyi

  2. Plasmodium ovale

  3. Plasmodium falciparum

  4. Plasmodium garnhami

  5. Plasmodium inui

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plasmodium garnhami is a protozoan parasite of the genus Plasmodium. It has both vertebrate and insect hosts. The vertebrate hosts for this parasite are birds.

Multiple choice

Neglected Tropical Diseases (NTDs) are a group of parasitic and bacterial diseases that cause substantial illness for more than one billion people globally. Which among the following is considered as one of the Neglected Tropical Diseases?

  1. Granulomatous amoebic encephalitis

  2. African trypanosomosis

  3. Alveolar echinococcosis

  4. Amoebiasis

  5. Schistosomiasis
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Schistosomiasis, also known as bilharzia, is a disease caused by parasitic worms. In terms of impact this disease is second only to malaria as the most devastating parasitic disease. Schistosomiasis is considered one of the Neglected Tropical Diseases.