1. Introduction to Microbiology

Which of these answers about helminths is true?

Why do many microbiologists study helminths if they are technically not microscopic?

Which of the following is used to classify organisms into the Kingdom Fungi?

a. ability to photosynthesize; possess a cell wall

b. unicellular; possess cell wall; prokaryotic

c. unicellular; lacking cell wall; eukaryotic

d. absorptive; possess cell wall; eukaryotic

e. ingestive; lacking cell wall; multicellular; prokaryotic

Use the following choices to answer questions 2 and 3:

1. metacercaria

2. redia

3. adult

4. miracidium

5. cercaria

Put the preceding stages in order of development, beginning with the egg.

a. 5, 4, 1, 2, 3

b. 4, 2, 5, 1, 3

c. 2, 5, 4, 3, 1

d. 3, 4, 5, 1, 2

e. 2, 4, 5, 1, 3

Which of the following statements about yeasts are true?

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Which of the following events follows cell fusion in an ascomycete?

a. conidiophore formation

b. conidiospore germination

c. ascus opening

d. ascospore formation

e. conidiospore release

Complete the following table:

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DRAW IT Identify the site colonized by the following organisms: E. granulosus, E. vermicularis, Giardia, H. pylori, hepatitis B virus, mumps virus, Rotavirus, Salmonella, Shigella, Streptococcus mutans, Trichinella spiralis, Trichuris.

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Explain how the following diseases differ and how they are similar: giardiasis, amebic dysentery, cyclosporiasis, and cryptosporidiosis.

Look at life cycle diagrams for human tapeworm and trichinellosis. Indicate stages in the life cycles that could be easily broken to prevent these diseases.

NAME IT Cysts of this flagellated organism survive in water; when ingested, the trophozoite grows in the intestine, causing diarrhea.

Use the following choices to answer questions 7–10:

a. Campylobacter

b. Cryptosporidium

c. Escherichia

d. Salmonella

e. Trichinella

A characteristic disease symptom caused by this microorganism is swelling around the eyes.

How many phyla are represented in the following list of organisms: Echinococcus, Cyclospora, Aspergillus, Taenia, Toxoplasma, Trichinella?

a. 1

b. 2

c. 3

d. 4

e. 5

Most roundworms are dioecious. What does this term mean? To what phylum do roundworms belong?

Give one possible explanation of why Penicillium would make penicillin, given that the fungus does not get bacterial infections.