exam 3 Flashcards
A person comes into the clinic with a wound that is severly inflamed, very painful, and turning black and bubbly. The diagnosis is leprosy. T/F
False
A woman comes to the emergency room with fever and vomiting. She soon develops a red rash all over her body, and her blood pressure begins to drop. What is likely diagnosis?
Toxic shock syndrome
Eating food contaminated with _____ may result in meningitis in at-risk persons.
Listeria monocytogenes
Group A streptococci are considered more virulent if their cytoplasmic membrane contains M protein.
True
Infection with Corynebacterium diphtheriae leads to the formation of _________ which can severely impair respiratory function.
pseudomembranes
Mycetoma which is a painless long-lasting infection characterized by swelling, pus production, and draining sores, is commonly caused by
nocardia
Mycobacterium tuberculosis is able to persist and be spread in aerosols due to its ability to produce endospores. T/F
False
Mycoplasma pneumoniae causes respiratory disease by
attaching to and ultimately killing the ciliated epithelial cells of the trachea
Otitis media may lead to dangerous meningitis in children due to infection with
Streptococcus pneumoniae
Painful swelling and rapidly spreading subcutaneous tissue necrosis is characteristic of a wound infection by
clostridium perfringens
Staph aureus can produce a toxin that dissolves the desmosomes that hold the adjoining cytoplasmic membranes of cells together and causes the patients skin cells to seperate. T/F
True
Staph aureus food poisoning is long lasting because ingested bacteria produce enterotoxins in the digestive system
false
Streptococci are frequently classified by
lancefield antigen designations
Strep agalactiae is associated with which of the following diseases
neonatal bacteremia, neonatal meningitis, and neonatal pneumonia
Strep pyogenes commonly causes streptococcal TSS in otherwise healthy people
False
Strep pyogenes produces and thereby avoid phagocytosis
M protein
The bacterium Clostridium _________ is an opportunistic pathogen that can cause a severe, potentially fatal diarrhea
difficile
The bacterium streptococcus mutans has a major role in the development of dental plaque and caries
true
The neurotoxins of clostridium botulinum produce ________ paralysis by preventing muscle contraction
flaccid
The presence of _____ can be used to distinguish Staphlococcus from other gram positive cocci
catalase enzyme
The primary reservoir of anthrax is herbivores
true
The skin lesions characteristic of cutaneous infections with bacillus anthracis are
eschars
Untreated strep pharyngitis may progress to
scarlet fever or rheumatic fever
What is one virulence factor that differentiates Staph aureus from other species of Staphlococci
It can produce coagulase
When observed in the lab, Mycoplasma stains __________
gram-negative
When strep infections involve the skin and surrounding lymph nodes, triggering pain and inflammation, the condition is known as
erysipelas
Which of the following diseases is considered an autoimmune disease triggered by bacterial infection?
rheumatic fever
Which of the following is an antiphagocytic factor of Staph?
protein A
Which of the following statements regarding Strep pyogenes is false
It produces protein A, which inhibits opsonization
