A nurse is caring for a client who has an infection caused by Streptococcus pyogenes. The nurse understands that this microorganism belongs to what group of bacteria?

Gram-positive cocci

Gram-negative cocci

Gram-positive bacilli

Gram-negative bacilli

Answer and Explanation

The Correct Answer is A

Choice A reason:

Gram-positive cocci are bacteria that have a spherical shape and stain purple with Gram stain due to their thick peptidoglycan cell wall. Streptococcus pyogenes is an example of gram-positive cocci that can cause infections such as pharyngitis, impetigo, cellulitis, necrotizing fasciitis, or rheumatic fever.

Choice B reason:

Gram-negative cocci are bacteria that have a spherical shape and stain pink with Gram stain due to their thin peptidoglycan cell wall and outer membrane. Neisseria gonorrhoeae and Neisseria meningitidis are examples of gram-negative cocci that can cause infections such as gonorrhea, meningitis, or septicemia.

Choice C reason:

Gram-positive bacilli are bacteria that have a rod-shaped shape and stain purple with Gram stain due to their thick peptidoglycan cell wall. Bacillus anthracis and Clostridium botulinum are examples of gram-positive bacilli that can cause infections such as anthrax, botulism, or tetanus.

Choice D reason:

Gram-negative bacilli are bacteria that have a rod-shaped shape and stain pink with Gram stain due to their thin peptidoglycan cell wall and outer membrane. Escherichia coli and Pseudomonas aeruginosa are examples of gram-negative bacilli that can cause infections such as urinary tract infection, wound infection, or sepsis.

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Correct Answer is B

Explanation

Choice A reason:

This is an incorrect answer because an induration of 5 mm or more is considered a positive reaction only for certain high-risk groups, such as people who are HIV-positive, have recent contact with a person with active tuberculosis, or have chest radiograph findings consistent with prior tuberculosis.

Choice B reason:

This is a correct answer because an induration of 10 mm or more is considered a positive reaction for most people, including those who are recent immigrants from high-prevalence countries, injection drug users, residents or employees of high-risk settings, children younger than 4 years old, or people with certain medical conditions that increase the risk of tuberculosis.

Choice C reason:

This is an incorrect answer because an induration of 15 mm or more is considered a positive reaction only for people who have no known risk factors for tuberculosis.

Choice D reason:

This is an incorrect answer because an induration of 20 mm or more is not a criterion for a positive reaction, as it exceeds the maximum threshold for any group.

A. Atrophy B. Hypertrophy C. Hyperplasia D. Dysplasia

Correct Answer is D

Explanation

Choice A reason:

Atrophy is a decrease in cell size or number in response to adverse stimuli, such as disuse, ischemia, or malnutrition. It does not increase the risk of cancer, but it can impair the function of tissues and organs.

Choice B reason:

Hypertrophy is an increase in cell size in response to normal or abnormal stimuli, such as exercise, hormones, or hypertension. It does not increase the risk of cancer, but it can affect the function of tissues and organs.

Choice C reason:

Hyperplasia is an increase in cell number in response to normal or abnormal stimuli, such as hormones, inflammation, or wound healing. It does not increase the risk of cancer, but it can cause excessive growth of tissues and organs.

Choice D reason:

Dysplasia is an abnormal and potentially reversible change in cell size, shape, and organization in response to persistent stressors. It can be a precursor to cancer if it is not detected and treated early.

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A nurse is caring for a client who has an infection caused by Streptococcus pyogenes. The nurse understands that this microorganism belongs to what group of bacteria?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Correct Answer is B

Explanation

A nurse is teaching a client who has a family history of breast cancer about the risk factors and prevention strategies. The nurse informs the client that one of the cellular adaptations that can increase the risk of breast cancer is:

Correct Answer is D

Explanation

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