3rd Lecture Exam Part 3

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Quiz am 3rd Lecture Exam Part 3, erstellt von Sunny-ko am 11/04/2014.
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Zusammenfassung der Ressource

Frage 1

Frage
The secondary stage of syphilis
Antworten
  • is when the patient is no longer infectious to others.
  • occurs within 10 days of the primary stage.
  • is a time when the pathogen enters and multiplies in the blood.
  • has no symptoms.
  • is when gummas develop in tissues.

Frage 2

Frage
During which stage of syphilis does fever, lymphadenopathy, and a red to brown rash occur?
Antworten
  • primary
  • secondary
  • tertiary
  • latent
  • All of the choices are correct

Frage 3

Frage
Permanent cardiovascular and neurological damage is seen in which stage of syphilis?
Antworten
  • primary
  • secondary
  • tertiary
  • latent
  • All of the choices are correct

Frage 4

Frage
Treponema, Borrelia, and Leptospira are all
Antworten
  • obligate parasites requiring host cells.
  • curved rods.
  • transmitted by arthropod vectors.
  • spirochetes.
  • bacteria without cell walls.

Frage 5

Frage
Yaws, Pinta, and Bejel are all diseases that
Antworten
  • are slow, progressive skin diseases that can spread to deep tissues.
  • are sexually transmitted.
  • are caused by arthropod vectors.
  • are caused by Vibrio species
  • are respiratory tract infections.

Frage 6

Frage
Infected animals shed Leptospira interrogans in their
Antworten
  • feces
  • blood
  • urine
  • respiratory secretions
  • saliva

Frage 7

Frage
Leptospirosis has all the following characteristics except
Antworten
  • most common in cattle, horses, pigs, and dogs
  • pathogen is a spirochete
  • infects kidneys, liver, brain, eyes
  • humans acquire it by contact with abraided skin or mucous membranes
  • can be transmitted by animal bites

Frage 8

Frage
Relapsing fever involves
Antworten
  • soft-bodied ticks transmitting Borrelia hermsii.
  • initial symptoms of fever, headache, fatigue.
  • late symptoms of vomiting, muscle aches, damage to liver, spleen, heart and kidneys.
  • human body louse transmitting Borrelia recurrentis.
  • All of the choices are correct.

Frage 9

Frage
The causative agent of Lyme disease is
Antworten
  • Ixodes scapularis
  • Borrelia hermsii
  • Borrelia burgdorferi
  • Ixodes pacificus
  • Leptospira interrogans

Frage 10

Frage
Erythema migrans, a bull's-eye rash, at the portal of entry is associated with
Antworten
  • syphilis
  • Rocky Mountain spotted fever
  • relapsing fever
  • Lyme disease
  • leptospirosis

Frage 11

Frage
The Argyll Robertson pupil that is fixed and small, and does not react to light but does accommodate for focusing is associated with
Antworten
  • Lyme disease
  • leptospirosis
  • chlamydiosis
  • Rocky Mountain spotted fever
  • tertiary syphilis

Frage 12

Frage
The white-footed mouse, deer, and deer ticks are important to maintaining the enzootic transmission cycle associated with
Antworten
  • Lyme disease
  • leptospirosis
  • chlamydiosis
  • Rocky Mountain spotted fever
  • tertiary syphilis

Frage 13

Frage
Control of rodent populations is important for preventing
Antworten
  • tick-borne relapsing fever
  • ornithosis
  • epidemic typhus
  • Q fever
  • All of the choices are correct

Frage 14

Frage
Lyme disease involves
Antworten
  • early symptoms of fever, headache, stiff neck.
  • crippling polyarthritis and cardiovascular and neurological problems.
  • people having contact with wooded or forested areas.
  • treatment with antimicrobics.
  • All of the choices are correct.

Frage 15

Frage
The RPR, VDRL, MHA-TP, FTA-ABS, and TPI tests are used to diagnose
Antworten
  • chlamydiosis
  • syphilis
  • lyme disease
  • Rocky Mountain spotted fever
  • Q fever

Frage 16

Frage
The virulence of Vibrio cholerae is due to its
Antworten
  • capsule
  • neurotoxin
  • invasive enzymes
  • enterotoxin
  • All of the choices are correct

Frage 17

Frage
Cholera symptoms are
Antworten
  • copious watery diarrhea
  • loss of blood volume
  • acidosis, sunken eyes, thirst
  • hypotension, tachycardia, shock
  • All of the choices are correct

Frage 18

Frage
The most immediate and important treatment needed to prevent death in Cholera victims is
Antworten
  • water and electrolyte replacement
  • antimicrobics
  • antitoxin
  • surgery
  • None of the choices are correct

Frage 19

Frage
An organism found in coastal waters that causes a food infection and gastroenteritis due to a variety of contaminated raw and undercooked seafood is
Antworten
  • Chlamydia trachomatis
  • Vibrio parahaemolyticus
  • Vibrio cholerae
  • Campylobacter jejuni
  • Helicobacter pylori

Frage 20

Frage
In patients with diabetes or liver disease, ingestion of raw oysters contaminated with this organism can lead to death
Antworten
  • Vibrio vulnificus
  • Vibrio parahaemolyticus
  • Vibrio cholerae
  • Campylobacter jejuni
  • Helicobacter pylori

Frage 21

Frage
"Rice water stools" are associated with disease caused by this organism:
Antworten
  • Vibrio vulnificus
  • Vibrio parahaemolyticus
  • Vibrio cholerae
  • Campylobacter jejuni
  • Helicobacter pylori

Frage 22

Frage
Helicobacter pylori causes
Antworten
  • gastritis
  • duodenal ulcers
  • stomach ulcers
  • increased risk for stomach cancer
  • All of the choices are correct

Frage 23

Frage
Which is NOT a characteristic of Helicobacter pylori?
Antworten
  • gram negative
  • produces enteroxin that causes diarrhea
  • curved rods
  • lives in the stomach
  • produces urease that buffers stomach acidity

Frage 24

Frage
All of the following are characteristics of Campylobacter jejuni except
Antworten
  • it is transmitted through ingestion of contaminated chicken, meat, milk, and water.
  • it causes fever and a watery to bloody diarrhea.
  • it infects the stomach.
  • it produces an enterotoxin that stimulates diarrhea.
  • it has gram negative curved rods with darting motility.

Frage 25

Frage
Characteristics of rickettsias include
Antworten
  • obligate parasites requiring host cells for growth.
  • arthropods serve as life cycle hosts and vectors.
  • gram negative coccobacilli.
  • host cells are required for ATP metabolism.
  • All of the choices are correct.

Frage 26

Frage
The pathogenesis of rickettsial infections often involves infection of
Antworten
  • endothelial lining of blood vessels
  • gastrointestinal lining
  • dermis of the skin
  • stomach mucosa
  • urinary tract

Frage 27

Frage
Which is mismatched?
Antworten
  • epidemic typhus – body louse feces
  • murine typhus – flea feces
  • rickettsial pox – mite bite
  • Rocky Mountain spotted fever – tick bite
  • human ehrlichiosis – flea bite

Frage 28

Frage
Rocky Mountain spotted fever
Antworten
  • is seen in highest numbers along the west coast.
  • is transmitted by Ixodes ticks
  • has symptoms that include fever, headache and rash.
  • never has severe complications.
  • All of the choices are correct.

Frage 29

Frage
All of the following pertain to erhlichiosis except
Antworten
  • it is transmitted by Amblyomma and Ixodes ticks.
  • it causes infection of monocytes.
  • it causes infection of granulocytes.
  • has symptoms that include fever, headache, and muscle pains.
  • the disease is showing a decreased incidence.

Frage 30

Frage
Which is incorrect regarding Q fever?
Antworten
  • transmitted by lice
  • pathogen produces resistant spores
  • humans infected from unpasteurized milk and airborne spread
  • causes fever, muscle aches, rash, and sometimes pneumonia
  • is a zoonosis

Frage 31

Frage
Which is mismatched?
Antworten
  • Rickettsia rickettsii – epidemic typhus
  • Coxiella burnetii – Q fever
  • Bartonella quintana – trench fever
  • Bartonella henselae – cat scratch disease
  • Rickettsia typhi – endemic (murine) typhus

Frage 32

Frage
The following are characteristics of Chlamydias except
Antworten
  • gram negative
  • obligate parasites that need host cells for growth
  • elementary bodies are the infectious form
  • elementary bodies lack enzyme systems for making ATP
  • reticulate bodies differentiate into elementary bodies

Frage 33

Frage
Chlamydia trachomatis causes
Antworten
  • nongonococcal urethritis (NGU) in males.
  • cervicitis in females.
  • congenital and adult inclusion conjunctivitis.
  • ocular trachoma.
  • All of the choices are correct.

Frage 34

Frage
Ornithosis is
Antworten
  • caused by Chlamydia pneumoniae.
  • a zoonosis of certain types of birds
  • a mild, upper respiratory tract illness.
  • has humans as a reservoir for the pathogen.
  • All of the choices are correct.

Frage 35

Frage
Lymphogranuloma venereum is caused by
Antworten
  • specific strains of Chlamydia trachomatis
  • Ureaplasma urealyticum
  • Mycoplasma hominis
  • Chlamydia psittaci
  • Chlamydia pneumoniae.

Frage 36

Frage
Which is incorrect about Mycoplasma pneumoniae?
Antworten
  • has birds as a reservoir
  • common cause of primary atypical pneumonia
  • initially causes fever, malaise, sore throat, headache
  • after 2 to 3 weeks develops into an unproductive cough and earache
  • is a bacterial cell without a cell wall

Frage 37

Frage
Oral flora bacteria on the tooth surface
Antworten
  • develop a biofilm.
  • use fimbriae and slime layers to adhere.
  • include streptococci that metabolize sucrose, produce sticky glucans, and form plaque.
  • lactobacilli and streptococci ferment carbohydrates and produce acids that cause caries.
  • All of the choices are correct.

Frage 38

Frage
Gingivitis is
Antworten
  • primarily caused by anaerobic oral flora.
  • erosion of tooth enamel causing a lesion.
  • caused by Streptococcus mutans
  • also called NUG.
  • None of the choices are correct.

Frage 39

Frage
Ureaplasma urealyticum is implicated in which of the following?
Antworten
  • nongonococcal urethritis
  • Rocky Mountain Spotted Fever
  • periodontal disease
  • Q fever
  • endemic typhus

Frage 40

Frage
All of the following can positively influence the structure of tooth enamel except
Antworten
  • fluoride
  • lysozyme in saliva
  • antibodies in saliva
  • refined sugar
  • genetics.

Frage 41

Frage
Treponema vincentii, Bacteroides forsythus, and fusobacteria synergistically are involved in which infection?
Antworten
  • gingivitis
  • necrotizing ulcerative gingivitis (NUG)
  • ornithosis
  • yaws
  • caries

Frage 42

Frage
Which of the following distinguishes syphilis from yaws?
Antworten
  • Syphilis is caused by a spirochete
  • Syphilis has a primary, secondary, and tertiary stages.
  • Syphilis is sexually transmitted.
  • Syphilis is treated with antibiotics.
  • Syphilis is a slow and progressive disease.

Frage 43

Frage
Which of the following are other names for yaws?
Antworten
  • bouba
  • frambesia tropica
  • patek
  • All of the choices are correct.
  • None of the choices are correct.

Frage 44

Frage
Hutchinson's teeth are
Antworten
  • a symptom of untreated Lyme disease.
  • a symptom of untreated periodontal disease.
  • a symptom of ANUG.
  • a symptom of congenital syphilis.
  • a symptom of congenital Chlamydia trachomatis.

Frage 45

Frage
The tertiary stage of syphilis
Antworten
  • is when gummas develop in tissues.
  • is when the patient is highly infectious to others.
  • occurs within 10 days of the primary stage.
  • has no symptoms.
  • is when a chancre develops.

Frage 46

Frage
Which is incorrect about Lyme disease?
Antworten
  • It is a new disease that started in Lyme, Connecticut.
  • Its reservoirs are mice and deer
  • It is transmitted by ticks.
  • It is nonfatal.
  • It can slowly progress and mimic rheumatoid conditions.

Frage 47

Frage
Which of the following diseases could be prevented with proper sewage disposal and water purification?
Antworten
  • Vibrio parahaemolyticus gastroenteritis
  • Vibrio vulnificus gastroenteritis
  • Cholera
  • Lyme disease
  • Leptospirosis

Frage 48

Frage
Which is incorrect about Leptospirosis?
Antworten
  • It can be avoided by not swimming in livestock watering ponds.
  • A vaccine is not available.
  • Its principle targets are the kidneys, liver, brain, and eyes.
  • It is a zoonosis.
  • Weil's syndrome occurs during the second phase of the disease.

Frage 49

Frage
Which bacteria could be responsible for hemolytic uremic syndrome (HUS)?
Antworten
  • enterotoxigeic strains of E. coli
  • Salmonella
  • Shigella dysenteriae
  • E. coli 0157:H7
  • enteroinvasive E. coli

Frage 50

Frage
Which of the following is not correct concerning Legionnaires disease?
Antworten
  • L. pneumophila lives in close associations with free-living amebas.
  • The disease is communicable from person to person.
  • Symptoms include cough, diarrhea, and abdominal pain.
  • . It is more common in males over 50 years of age.
  • Cases have been traced to the fallout from the Mount Saint Helen's volcano.

Frage 51

Frage
Which of the following is not correct concerning the plague?
Antworten
  • Mice, voles and other rodents are primary long-term reservoirs.
  • Strains of the plague bacillus are less virulent today as in the Middle Ages
  • It is transmitted by flea vectors.
  • Less than 10 cases per year occur in the US.
  • The etiological agent is Yersinia pestis.

Frage 52

Frage
What is the usual cause of pseudomembranous colitis?
Antworten
  • improperly home-preserved foods containing botulin toxin
  • eating unpasteurized dairy containing Listeria monocytogenes
  • handling infected animals contaminated with E. rhusiopathiae
  • therapy with broad-spectrum antibiotics leading to superinfection by C. difficile
  • living in close contact with someone infected with C. perfringens

Frage 53

Frage
Which of the following may be recommended for treating gangrene?
Antworten
  • debridement of the wound
  • hyperbaric chamber
  • amputation of affected limb
  • rigorous cleansing of deep wounds
  • All of the choices are correct.

Frage 54

Frage
Mild, uncomplicated cases of pseudomembranous colitis may be treated by
Antworten
  • debridement
  • wound cleansing
  • vancomycin for several weeks
  • withdrawal of antibiotics and replacement of lost fluids and electrolytes
  • All of the choices are correct

Frage 55

Frage
Viruses have all the following except
Antworten
  • definite shape
  • metabolism
  • genes
  • ability to infect host cells
  • ultramicroscopic size

Frage 56

Frage
Host cells of viruses include
Antworten
  • human and other animals
  • plants and fungi
  • bacteria
  • protozoa and algae
  • All of the choices are correct

Frage 57

Frage
The core of every virus particle always contains
Antworten
  • DNA
  • capsomers
  • enzymes
  • DNA and RNA
  • either DNA or RNA

Frage 58

Frage
Classification of viruses into families involves determining all the following characteristics except
Antworten
  • type of nucleic acid
  • type of capsid
  • presence of an envelope
  • biochemical reactions
  • nucleic acid strand number

Frage 59

Frage
Which of the following represents a virus family name?
Antworten
  • Herpes simplex virus
  • Herpesviridae
  • Picornavirus
  • Enterovirus
  • Hepatitis B virus

Frage 60

Frage
Virus capsids are made from subunits called
Antworten
  • envelopes
  • spikes
  • capsomeres
  • prophages
  • peplomers

Frage 61

Frage
Helical and icosahedral are terms used to describe the shapes of a virus
Antworten
  • spike
  • capsomere
  • envelope
  • capsid
  • core

Frage 62

Frage
Which of the following is correct about viruses?
Antworten
  • cannot be seen with a light microscope
  • are procaryotic
  • contain 70S ribosomes
  • undergo binary fission
  • can be grown on nutrient agar

Frage 63

Frage
All of the following pertain to virus envelopes except they
Antworten
  • gained as a virus leaves the host cell membrane.
  • gained as a virus leaves the nuclear membrane.
  • contain special virus proteins.
  • help the virus particle attach to host cells.
  • located between the capsid and nucleic acid.

Frage 64

Frage
Which of the following is not associated with every virus?
Antworten
  • envelope
  • capsomers
  • capsid
  • nucleic acid
  • genome

Frage 65

Frage
These structures are used by bacteriophages to attach to host cell receptors
Antworten
  • sheath
  • tail fibers
  • nucleic acid
  • capsid head
  • None of the choices are correct

Frage 66

Frage
Which is incorrect about prophages?
Antworten
  • present when the virus is in lysogeny
  • formed when viral DNA enters the bacterial chromosome
  • replicated with host DNA and passed on to progeny
  • cause lysis of host cells
  • occur when temperate phages enter host cells

Frage 67

Frage
T-even phages
Antworten
  • include the poxviruses
  • infect Escherichia coli cells
  • enter host cells by engulfment
  • have helical capsids
  • All of the choices are correct.

Frage 68

Frage
The correct sequence of events in viral multiplication is
Antworten
  • penetration, replication, maturation, adsorption, assembly, release.
  • replication, penetration, maturation, assembly, absorption, release.
  • adsorption, penetration, replication, maturation, assembly, release
  • assembly, maturation, replication, release, penetration, adsorption.
  • adsorption, release, maturation, replication, assembly, penetration.

Frage 69

Frage
The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is
Antworten
  • adsorption to the host cells
  • injection of the viral nucleic acid into the host cell
  • host cell synthesis of viral enzymes and capsid proteins
  • assembly of nucleocapsids
  • replication of viral nucleic acid

Frage 70

Frage
Viruses acquire envelopes around their nucleocapsids during
Antworten
  • replication
  • assembly
  • adsorption
  • release
  • penetration

Frage 71

Frage
Which of the following will not support viral cultivation?
Antworten
  • live lab animals
  • embryonated bird eggs
  • primary cell cultures
  • continuous cell cultures
  • blood agar

Frage 72

Frage
In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.
Antworten
  • nucleus, cytoplasm
  • cytoplasm, cell membrane
  • cell membrane, cytoplasm
  • cytoplasm, nucleus
  • nucleus, endoplasmic reticulum

Frage 73

Frage
Host range is limited by
Antworten
  • type of nucleic acid in the virus
  • age of the host cell
  • type of host cell receptors on cell membrane
  • size of the host cell
  • All of the choices are correct.

Frage 74

Frage
The virus-induced, specific damage to the host cell that can be seen in a light microscope is called
Antworten
  • lysogeny
  • budding
  • plaques
  • cytopathic effects
  • pocks

Frage 75

Frage
Visible, clear, well-defined patches in a monolayer of virus-infected cells in a culture are called
Antworten
  • lysogeny
  • budding
  • plaques
  • cytopathic effects
  • pocks

Frage 76

Frage
Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called
Antworten
  • lysogeny
  • budding
  • plaques
  • cytopathic effects
  • pocks

Frage 77

Frage
Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called
Antworten
  • latent
  • oncogenic
  • prions
  • viroids
  • delta agents

Frage 78

Frage
Which of the following is a type of cytopathic effect?
Antworten
  • inclusions in the nucleus
  • multinucleated giant cells.
  • inclusions in the cytoplasm
  • cells round up
  • All of the choices are correct.

Frage 79

Frage
Uncoating of viral nucleic acid
Antworten
  • does not occur in bacteriophage multiplication
  • involves enzymatic destruction of the capsid
  • occurs during penetration in the multiplication cycle
  • occurs before replication
  • All of the choices are correct

Frage 80

Frage
Infectious protein particles are called
Antworten
  • viroids
  • phages
  • prions
  • oncogenic viruses
  • spikes

Frage 81

Frage
Infectious naked strands of RNA are called
Antworten
  • viroids
  • phages
  • prions
  • oncogenic viruses
  • spikes

Frage 82

Frage
Creutzfeld-Jacob disease is
Antworten
  • caused by a chronic latent virus
  • initiated by an oncogenic virus
  • caused by a viroid
  • a spongiform encephalopathy of humans
  • also called "mad cow disease".

Frage 83

Frage
Satellite viruses are
Antworten
  • also called viroids
  • dependent on other viruses for replication
  • the cause of spongiform encephalopathies
  • significant pathogens of plants
  • All of the choices are correct.

Frage 84

Frage
All of the following is correct about treating viral diseases except
Antworten
  • viruses are killed by the same antibiotics that kill bacteria
  • many antiviral drugs block viral replication
  • many antiviral drugs cause severe side effects
  • interferons show potential for treating and preventing viral infections
  • All of the choices are correct.

Frage 85

Frage
The capsomers are made of
Antworten
  • DNA
  • RNA
  • Lipids
  • Protein
  • Carbohydrate

Frage 86

Frage
Viruses that consist of only a nucleocapsid are considered
Antworten
  • simple viruses
  • complex viruses
  • naked viruses
  • viroids
  • incomplete viruses

Frage 87

Frage
The nucleocapsid consists of
Antworten
  • the capsomers assembled into the capsid
  • the nucleic acid of the virus only
  • the nucleic acid along with the capsid
  • the envelope and capsid
  • the envelope, nucleic acid and caspid

Frage 88

Frage
Which of the following parts of a virus is not always present?
Antworten
  • envelope
  • nucleic acid
  • capsid
  • capsomers
  • None of the choices are optional parts of a virus

Frage 89

Frage
When a virus enters a lysogenic phase, it means
Antworten
  • the virus is integrated into the DNA of the host cell and is latent.
  • the virus is bursting through the host cell membrane.
  • the virus is starting biosynthesis of its nucleic acid.
  • the virus will remain in circulation and not continue infecting its host.
  • the number of viruses in the host is decreasing as the immune system becomes effective.

Frage 90

Frage
All of the following are characteristics of viruses except
Antworten
  • they can be crystallized.
  • they often have a geometric capsid
  • they have a viscous fluid inside their capsids
  • they can cause fatal diseases.
  • they can cause mild diseases.
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