Lecture 3 Exam

Question 1

Bacteria and archaea share which of the following characteristics?

Answer 1

They are both prolaryotc cell types.

Question 2

What is a reason why viruses CANNOT be classified in a kingdom”

Answer 2

They are not composed of cells.

Question 3

Microorganisms belonging to the same ______
would be expected to share the most characteristics with each other.

Answer 3

Species

Question 4

If two organisms belong to the same class, they MUST belong to the same:

Answer 4

phylum

Question 5

What does the polymerase chain reaction (PCR) detect?

Answer 5

Pathogen DNA

Question 6

Which of the following techniques can identily antibodies in a patient’s serum?

Answer 6

Western blotting

Question 7

The catalase test is an example of ain):

Answer 7

biochemical test.

Question 8

The largest bacterial phylum is:

Answer 8

Proteobacteria

Question 9

_______ is responsible for more illnesses and causes a greater variety of disease than arry other group of bocteria.

Answer 9

Streptococcus

Question 10

A high fever and significant mortality are associated with this enteric, which affects only humans and is passed through fecal cortaminsion.
Mary Mallon was a famous carrier.

Answer 10

Salmonella

Question 11

A new microbe has been discovered! It lacks a nucleus, is shaped like a corkscrew, and uses axial hlaments to move. This orprion h mont likely related to _____

Answer 11

Borrelia

Question 12

Which of the following is NOT caused by a toxin?

All of the above are caused by a toxin
food poisoning
scarlet fever
tetanus
Anthrax

Answer 12

All of the above are caused by a tooin.|

Question 13

I am a Gram-negative rod with a requirement for blood in my growth medium. I am often mistaken as the cause of a viral respiratory infection. Who am I?

Answer 13

Haemophilus infuenzae

Question 15

To specifically diagnose leprosy or tuberculosis, which staining test would be most appropriate?

Answer 15

Acid-fast stain

Question 16

I am a Gram-negative enteric and the most common cause of urinary tract infections (UTs). Who am I?

Answer 16

Esercherichia coli

Question 17

A skin rash is associated with which of the following?

Neisseria
All of above
Treponma
Rickettsia
Strepococcus

Answer 17

All of above

Question 18

I am the number one cause of preventable blindness worldwide. Who am I?

Answer 18

Chlamydia

Question 19

When I infect you, you may think you have the flu at first, but i’ll probably mark you with a “bullseye! lynore me, and I can cause your knees to swell and your face to droop. Who am I?

Answer 19

Borrelia

Question 20

A sample of cerebrospinal fuid (CSF) that looked like the one shown below would suggest
Picture of a high turbidity

Answer 20

Meningitis

Question 21

Swollen lymph nodes that may burst and tissue death are characteristic of:

Bacillus anthrocis
None of the above
Staphylococcus cureus
Neisseria meningitids
Clostridium botuinun

Answer 21

None of the above

Question 22

Rehydration is routinely used to treat infections with:

Answer 22

Vibrio

Question 23

The diseases tetanus, botulism, and gas gangrene are associated with the genus:

Answer 23

Clostridium

Question 24

Your roommate tells you that the maple syrup has bacterial growth. Without looking, you suspect the growth is actually a fungus because

Answer 24

fungi can withstand a high osmotic pressure

Question 25

Fungal infections are generally chronic (long-lasting). Why is this?

Answer 25

Because fungi tend to grow more slowly than bacteris

Question 26

A patient came to a health clinic with a scrape on her hand. A sample of the wound was cultured on blood agar and nutrient cultured medium. Yeast-like cells were observed on blood agar, whereas hyphae were observed on nutrient culture medium. The most likely cause of the infection is a:

Answer 26

dimorphic fungus.

Question 27

I am a eukaryotic pathogen. I don't harm healthy individuals, but I cause the most common lie-threatening infection in AIDS patients. Who am I?

Answer 27

Pneumocystis

Question 28

If you become infected with me, you develop a flu-like illness, but I can cause bone lesions, skin ulcers, and heart infammation i you're immune compromised. I am endemic (constantly present) in large areas of the American Southwest, including Arizona and part of Utah. Whe am I?

Answer 28

Coccidioides

Question 29

In a food chain consisting of these four organisms, which acts as the decomposer?

Answer 29

fungi

Question 30

Creamy white lesions, usually on the tongue or inner cheeks, are associated with this opportunistic pathogen.

Answer 30

Candida

Question 31

Fungi are _______ meaning they obtain their nutrients from dead organic matter. Thus, they are important in recyding chemical elemerts

Answer 31

saprobes

Question 32

Algae differ from fungi in that algae

Answer 32

are autotrophs

Question 33

The incidence of serious fungal infections has increased over the last 20 years because:

Answer 33

the number of at-risk patients has increased.

Question 34

While working in his yard, Kevin noticed a collection of pigeon droppings around his bird feeder. Before clearing up the mest, Kevin put on a pair of gloves and a face mask. What fungal pathogen was Kevin most likely trying to avoid?

Answer 34

Cryptococcus neoformons

Question 35

A patient presented to his doctor with a series of small ulcers, running in a line up his arm. In speaking with the putient, the doctor earmed that the man was an avid gardener who had received a series of puncture wounds while pruning his rose bushes. The doctor wrote a prescription for itraconazole and sent the patient home. What is the most likely diagnosis?

Answer 35

sporotrichosis

Question 36

All protozoan pathogens have a _____ phase

Answer 36

trophozoite

Question 38

Tapeworms have been suggested as a weight loss aid because they feed on:

Answer 38

intestinal contents

Question 39

Four days after swimming at a local recreation center, several 3- and 4-year-old children experienced abdominal cramd Microscopic examination of the children's stools revealed oocysts. What is the most likely diagnosis

Answer 39

infection with Cryptosporidium

Question 40

A patient infected with Taenia saginata would most likely have:

Answer 40

Proglottids in the feces

Question 41

Arthropods that carry pathogenic microorganisms are called:

Answer 41

Vectors

Question 42

In mid-December, a woman with insulin-dependent diabetes who had been on prednisone tell and received an abrasion on the dorsal side of her right hand. She was placed on penicillin. By the end of January, the ulcer had not healed, and the was referred to a plastic surgron. On January 30, a swab of the wound was cultured at 35°C on blood agar. On the same day, a smear was made for Gram staining. The Gram staining showed large (10 um) cells. Brownish, waxy colonies grew on the blood agar. Slide cultures set up on February 1 and inculated at 25°C. showed septate hyphae and single conidia. The most likely cause of the infection is a

Answer 42

Dimorphic fungus.

Question 43

The sexual reproduction of Plasmodium takes place in my gut. That's why I'm called the dehnitive host. Who am ?

Answer 43

Mosquito

Question 44

Platelets produce peptides that can kill certain parasites in red blood cells. Therefore, aspirin, which inactivates platelets may be a poor drug to use in people with:

Answer 44

Malaria

Question 45

Yeast infections are caused by:

Answer 45

Candida albicans.

Question 46

Which of the following is INCORRECTLY matched? can form blockages in the Gi tract - Ascaris lumbricoldes diagnosed using Graham's sticky tape method - Enteredius vermiculois undercooked pork - trichinellasis Correct measly beet - Trypanosoma brucei gombense can cause allengio reactions or asthma attacks - dust mites

Answer 46

measly beet - Trypanosoma brucei gombense

Question 47

Which protozoan causes an STI?.

Answer 47

Trichomonas

Question 48

Tyson just returned from a trip to sub-Saharan Africa. He had a great time, but since he's been back he has suffered with constant fatigue. A quick trip to the doctor revealed anemia and enlargement of the spleen. Tyson's signs and symptoms are most consistent with

Answer 48

Plasmodium

Question 49

Fine-tooth combs, shampoos containing permethrin, and washing of household items at high temperatures are all standard ways to eliminate

Answer 49

Lice

Question 51

Which of the following procedures would make an effective program for reducing infestation with Taenia saginata?

Answer 51

Food inspection

Question 52

Which of the following pairs is mismatched? kissing bug -Chagas disease myaisis -mosquitoes Toxoplasmo-domestic cats Anopheles-malaria Tsetse fly-sleeping sickness

Answer 52

Myaisis- mosquitos