Question 1

Which organism is shown in the first image, and what class of helminths does it belong to?

Accepted Answer

Taenia solium, a cestode

Question 2

Taenia solium can cause which two diseases in humans?

Accepted Answer

Taeniasis and cysticercosis

Question 3

The organism in the third image is associated with which disease, and what is the main risk factor for developing this condition?

Accepted Answer

Cysticercosis; ingestion of undercooked pork containing Taenia solium eggs

Question 4

The fourth image shows a type of helminth. What is its classification and where is it most commonly found in the human body?

Accepted Answer

Nematode (roundworm); intestines

Question 5

The fifth and sixth images show a type of helminth. What is the classification of this organism?

Accepted Answer

Trematode (fluke)

Question 6

In the seventh image, which part of the tapeworm is responsible for attachment to the host's intestinal wall?

Accepted Answer

Scolex

Question 7

The eighth image shows a blood smear with an intracellular parasite. What is the causative agent of malaria?

Accepted Answer

Plasmodium species

Question 8

Which test would you use to differentiate between Staphylococcus and Streptococcus species?

Accepted Answer

Catalase test

Question 9

Which type of hemolysis is characterized by complete destruction of red blood cells, resulting in a clear zone around bacterial colonies on blood agar?

Accepted Answer

Beta hemolysis

Question 10

A Durham tube is used to detect which metabolic process in bacteria?

Accepted Answer

Gas production during fermentation

Question 11

Which test would you use to distinguish between a bacterium that ferments only glucose and one that ferments both glucose and lactose?

Accepted Answer

Triple Sugar Iron Agar (TSIA) test

Question 12

A positive result on bile esculin agar is indicated by which color change, and which organism is commonly positive?

Accepted Answer

Blackening of the medium; Enterococcus faecalis

Question 13

Which of the following bacteria is oxidase positive?

Accepted Answer

Pseudomonas aeruginosa

Question 14

On EMB agar, which characteristic indicates a bacterium is a lactose fermenter?

Accepted Answer

Metallic green colonies

Question 15

Which genus of bacteria is able to grow on Mannitol Salt Agar (MSA), and what does a yellow color indicate?

Accepted Answer

Staphylococcus; fermentation of mannitol

Question 16

Which test is used to identify Streptococcus pneumoniae by its susceptibility to a specific chemical disk?

Accepted Answer

Optochin test

Question 17

Which of the following statements about UV light as a disinfectant is correct?

Accepted Answer

UV light cannot kill bacterial endospores due to its limited penetrating power

Question 18

Which of the following is a function of inflammation?

Accepted Answer

Destroys injurious agents and repairs tissue

Question 19

Which antibody class is primarily found in secretions such as breast milk, saliva, and tears?

Accepted Answer

IgA

Question 20

Which of the following diseases is caused by a prion?

Accepted Answer

Creutzfeldt-Jakob Disease (CJD)

Helminths: Tapeworms, Diseases, and Identification

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