Which of the following can be determined using culture and sensitivity tests?

Decision to administer either a bactericidal or bacteriostatic drug

Microbial susceptibility to an anti-infective

Duration of the antibacterial drug therapy

Decision to administer empiric therapy

Answer and Explanation

The Correct Answer is B

A. Decision to administer either a bactericidal or bacteriostatic drug:

Culture and sensitivity tests provide information about the susceptibility of the microorganism to specific antimicrobial agents. Based on this information, healthcare providers can choose between bactericidal (agents that kill bacteria) or bacteriostatic (agents that inhibit bacterial growth) drugs. For example, if the culture indicates that the microorganism is susceptible to a bactericidal drug, such as penicillin, the healthcare provider may choose to administer that type of drug.

B. Microbial susceptibility to an anti-infective:

This option accurately describes one of the primary purposes of culture and sensitivity tests. These tests determine whether the microorganism causing the infection is susceptible or resistant to specific antimicrobial agents. This information guides the selection of the most appropriate anti-infective therapy to effectively treat the infection.

C. Duration of the antibacterial drug therapy:

While culture and sensitivity tests provide valuable information about microbial susceptibility to antimicrobial agents, they do not specifically determine the duration of antibacterial drug therapy. The duration of therapy is often determined based on factors such as the type and severity of the infection, the patient's response to treatment, and clinical guidelines, rather than solely on the results of culture and sensitivity tests.

D. Decision to administer empiric therapy:

Empiric therapy involves the initiation of antimicrobial treatment based on clinical judgment and knowledge of likely pathogens before culture and sensitivity results are available. Culture and sensitivity tests help confirm the causative microorganism and guide subsequent treatment decisions, including adjustments to therapy based on the results. Therefore, while culture and sensitivity tests inform decisions regarding antimicrobial therapy, they do not directly determine whether empiric therapy should be initiated.

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Correct Answer is C

Explanation

A. An infection that is difficult to treat:

This choice describes a challenging infection but does not specifically capture the concept of a superinfection. While superinfections can indeed be difficult to treat, they are defined more specifically as secondary infections that occur due to disruption of the normal microbial flora during the treatment of an initial infection.

B. An infection caused by a weakened immune system:

This choice describes an infection that occurs due to a compromised or weakened immune system, which can indeed increase the risk of developing infections, including superinfections. However, it does not fully encompass the definition of a superinfection, which specifically involves the overgrowth of opportunistic pathogens after the disruption of normal microbial flora by antimicrobial treatment.

C. A secondary infection that occurs when microorganisms normally present in the body are killed by the drug:

This choice accurately describes what a superinfection is. It highlights the key concept that a superinfection is a secondary infection that arises when antimicrobial treatment disrupts or kills the normal microbial flora of the body, allowing opportunistic pathogens to overgrow and cause infection.

D. A drug-resistant infection:

This choice describes an infection caused by microorganisms that are resistant to the effects of antimicrobial drugs. While drug resistance is a significant concern in healthcare, it does not specifically define a superinfection. Superinfections can involve drug-resistant microorganisms, but they are not solely characterized by drug resistance; rather, they are secondary infections resulting from the disruption of normal microbial flora during antimicrobial treatment.

A. Echinacea B. Saw palmetto C. Black cohosh D. Cranberry juice

Correct Answer is D

Explanation

A. Echinacea:

Echinacea is an herbal supplement commonly used to support the immune system and reduce the severity and duration of cold symptoms. However, there is limited evidence to support its efficacy in preventing urinary tract infections (UTIs). While it may have some immune-boosting properties, it is not typically recommended specifically for UTI prevention.

B. Saw palmetto:

Saw palmetto is an herbal supplement often used for prostate health and to alleviate symptoms of benign prostatic hyperplasia (BPH) in men. It is not typically used for preventing urinary tract infections in either men or women.

C. Black cohosh:

Black cohosh is an herbal supplement commonly used by women to alleviate symptoms of menopause, such as hot flashes and mood swings. It is not typically used for preventing urinary tract infections.

D. Cranberry juice:

Cranberry juice and cranberry supplements have long been studied for their potential role in preventing urinary tract infections, particularly in women. Cranberry contains compounds that may prevent bacteria, such as Escherichia coli (E. coli), from adhering to the walls of the urinary tract, reducing the risk of infection. While the evidence supporting cranberry's effectiveness in preventing UTIs is mixed, some studies suggest that it may be beneficial, especially in individuals prone to recurrent UTIs.

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Which of the following can be determined using culture and sensitivity tests?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is D

Explanation

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