Chapter 13: Agents Of Infectious Disease Flashcards
True or False
The main difference between bacteria and viruses is that bacteria contain nucleic acids and viruses do not.
False
True or False
A Gram positive bacterium has a thin internal cell wall.
False
What are the three most common bacterial shapes?
1- Cocci
2- Bacilli
3- Spiral
What is the difference between a microaerophilic bacterium and an aerobic bacterium?
A microaerophilic bacterium grows best in low oxygen concentration: an aerobic bacterium grows in a normal atmospheric concentration of oxygen
Name at least three characteristics that are used to identify bacteria
1- Oxygen requirements
2- Staining characteristics
3- pH needs
4- Nutrition requirements
5- Form and structure
Which of the following is not a mode of bacterial locomotion?
A- Squirming
B- Gliding
C- Writhing
D- Propulsion
C- Writhing
A bacteria with cilia will have:
A- Hair like structures on the outside of the plasma membrane
B- Long tail-like structures on the outside of the cell
C- A blob-like shape and smooth cell wall
D- A thick capsule surrounding the cell
A- Hair like structures on the outside of the plasma membrane
Bacteria staining dark blue to purple with Gram stain are called:
Gram positive
True or False
Most viruses have a cytoplasm which contains DNA, RNA, and proteins.
False
What is the definition of virulence?
A- The degree of pathogenicity of a microorganism
B- The ability of an organism to infect a host
C- The speed with which an organism can replicate
D- The resistance of an organism to the immune system
A- The degree of pathogenicity of a microorganism
Prions are infectious agents that are made up of:
Proteins
What two diseases are believed to be caused by prions?
1- Bovine spongiform encephalopathy (BSE or mad cow disease)
2- Scrapie in sheep
Hyphae are multicellular tubular structures characteristic of:
A- Prions
B- molds
C- Yeasts
D- Viruses
B- Molds
Which of the following statements about Pneumocystis spp. is FALSE?
A- Pneumocystis is a significant clinical concern in immunosuppressed animals
B- Pneumocystis is a common organism found in many different laboratory species
C- Pneumocystis is a cutaneous mycosis causing hair loss and scaly skin
D- Pneumocystis is a pathogenic fungi that is considered a systemic mycosis
C- Pneumocystis is a cutaneous mycosis causing hair loss and scaly skin
What is the common name for dermatophytosis?
Ringworm
True or False
Very strict husbandry protocols are necessary to prevent prion transmission.
True
Parasites that live on the outside of the body are known as _________________; parasites that live in the body are known as ___________________.
Ectoparasites ; endoparasites
Does Shigella spp. cause an infestation or infection?
Infection
Does Microsporum spp. cause an infestation or infection?
Infection
Do fleas cause an infestation or infection?
Infestation
Does Entamoeba histolytica cause an infestation or infection?
Infection
Does Giardia spp. cause an infestation or infection?
Infection
Do ticks cause an infestation or infection?
Infestation
Do Heartworms cause an infestation or infection?
Infection
Do pinworms cause an infestation or infection?
Infection
Do flukes cause an infestation or infection?
Infection
Do tapeworms cause an infestation or infection?
Infection
What is the route by which animal facility personnel may become infected by amoebas?
Contact with the animal’s contaminated feces
What animal is the true definitive host for Toxoplasma gondii?
Cat
What flagellate causes sleeping sickness?
Trypanasoma Brucei
Which of the following characteristics apply to helminths? Choose all that apply
A- They are multicellular
B- Most can only be seen under a microscope
C- They have differentiated organs
D- They are ectoparasites
E- None or zoonotic
F- They all have an aquatic stage in their life cycle
A- They are multicellular
C- They have differentiated organs
Which of the following groups of parasites contain organisms that can be observed without the use of a microscope? Choose all that apply
A-Protozoa
B- Helminths
C- Arthropods
D- Apicomplexans
B- Helminths
D- Apicomplexans
What term describes lice infestation?
Pediculosis
True or False
One characteristic that distinguishes fleas from lice is that fleas have wings and lice do not.
False
What is the pH range in which clinically relevant bacteria grow?
Between 6.5 and 7.5
What is another name for nematodes?
Roundworms
True or False
Ticks and mites go through a nymph stage during their development.
True
True or False
Acariasis is the term used to describe the presence of leeches on the skin of animals.
False
True or False
Fleas have two sets of wings.
False
True or False
Mange in dogs and other animals is caused by mites
True
