Chapter 12 micro

Which of the following organisms requires an additional non-human host to complete its lifecycle?

Plasmodium species

Humans are the definitive host for __________, which is a type of __________.

Taenia saginata; tapeworm

Which of the following statements best describes why the treatment for Tori's fungal infection may result in side effects to her own cells?

Fungal cells and human cells have a nucleus, multiple organelles and 80s ribosomes for protein synthesis

How do pseudohyphae in yeasts differ from vegetative hyphae in filamentous fungi?

Yeasts use pseudohyphae to invade host tissue, whereas filamentous fungi use their vegetative hyphae for obtaining nutrients.

Which of the following could Tori's physician choose as a treatment for her yeast infection?

- a single oral dose of fluconazole - a topical over-the-counter ointment, such as clotrimazole or miconazole

The head of a tapeworm intestinal parasite is known as the:

Scolex

Dengue fever is transmitted by which of the following?

Mosquitos

Dinoflagellates are a type of unicellular . One genus of dinoflagellates is responsible for a food borne disease called .

Algae; paralytic shellfish poisoning (PSP)

How to blastoconidia and chlamydoconidia produced by yeast differ from bacterial endospores?

Blastoconidia and chlamydoconidia are spore structures produced by budding in yeasts, whereas bacterial endospores are produced by bacteria under extreme conditions

Tori, a 24-year-old graduate student, had been suffering from a respiratory infection for over a week. She went to the student health center, where the physician prescribed her a broad-spectrum antibiotic. By the end of her round of antibiotics, Tori was no longer suffering from respiratory complications, but she had noticed an increase in itchiness in her genital region. Within a few days, the itchiness was getting worse and was accompanied by a vaginal discharge that had a cheesy consistency and foul odor. Tori returned to the student health center to discuss her condition with the physician. A sample of her discharge was taken and sent to the laboratory for microscopy and plating. Based on the lab results, which organism is most likely causing Tori's new symptoms?

Candida albicans

Yeast infections are caused by

Candida albicans

In the helminth life cycles, the organism that harbors the adult sexually reproductive phase of the parasite is called the intermediate host

False

Most cases of hookworm infection are acquired by ingestion of adult forms is contaminated food or water

False

Which statement regarding helminths is true?

Helminths usually possess specialized organ systems, including circulatory, nervous, and reproductive systems.

Trichomonas vaginalis can be distinguished from other parasitic Protozoa by which of the characteristics listed below?

It has an undulating membrane, infects the vagina, and is frequently transmitted by sexual contact.

Which of the following infections are also caused by C. Albicans?

Oral thrush and fulminating disease

Which of the following best explains why Tori developed a new series of symptoms?

The antibiotics that treated Tori's primary respiratory infection also removed some of her normal bacterial flora, resulting in an overgrowth of other organisms.

When we say that a human is a dead end host for a parasite, we mean

The infected human is highly unlikely to transmit the infection to another organism

All of the following are characteristics of algae EXCEPT which ONE of the following?

They are currently classified as plants.

Which of the following statements about Protozoa is true?

When conditions become harsh, some protozoa can form a protective capsule, which is called a cyst.

The term dermatophyte is typically used for fungi that cause which of the following?

cutaneous mycoses

The encysted larva of the beef tapeworm is called a

cysticercus

If a larva of Echinococcus granulosus is found in humans, humans are the

intermediate host