A client presents with symptoms of a urinary tract infection (UTI). The nurse anticipates that the most likely causative agent of this UTI based on the given information is:
Staphylococcus aureus
Streptococcus pneumoniae
Escherichia coli (E. coli)
Klebsiella pneumoniae
The Correct Answer is C
Rationale:
A. Staphylococcus aureus is incorrect. While S. aureus can occasionally cause urinary tract infections, it is not the most common causative agent. S. aureus UTIs are more often associated with catheterization, hospital-acquired infections, or bacteremia, rather than community-acquired uncomplicated UTIs.
B. Streptococcus pneumoniae is incorrect. S. pneumoniae primarily causes respiratory infections such as pneumonia, otitis media, and meningitis. It is rarely implicated in urinary tract infections, so it is not the likely pathogen in this scenario.
C. Escherichia coli (E. coli) is correct. E. coli is the most common causative agent of UTIs, responsible for approximately 75–95% of community-acquired infections. It normally resides in the gastrointestinal tract and can ascend the urethra to infect the bladder (cystitis) or kidneys (pyelonephritis). Symptoms often include dysuria, urinary frequency and urgency, suprapubic discomfort, and cloudy or foul-smelling urine.
D. Klebsiella pneumoniae is incorrect. K. pneumoniae can cause UTIs, particularly in hospitalized patients or those with indwelling catheters, but it is much less common than E. coli in community-acquired UTIs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Decreased blood flow to the kidneys is not related to stress incontinence. While renal perfusion affects urine production, it does not cause leakage of urine due to increased pressure or pelvic floor weakness.
B. Involuntary detrusor muscle spasms are associated with urge incontinence, not stress incontinence. In urge incontinence, sudden, strong contractions of the detrusor muscle lead to an urgent need to void, often resulting in leakage if the person cannot reach a bathroom in time.
C. Lack of bladder sensation can contribute to functional incontinence or overflow incontinence but is not the primary mechanism in stress incontinence. Functional incontinence occurs when the person is unable to respond to normal bladder signals due to cognitive or physical impairments.
D. Increased intra-abdominal pressure is the primary cause of stress incontinence in women. Stress incontinence occurs when physical activities such as coughing, sneezing, laughing, or exercising increase pressure within the abdomen, and the weakened pelvic floor muscles or urethral sphincter are unable to maintain closure. This results in involuntary leakage of urine. Factors such as pregnancy, childbirth, aging, and hormonal changes can weaken pelvic floor support, making stress incontinence more common in women.
Correct Answer is C
Explanation
A. A dry, hacking cough is a classic sign of left-sided heart failure, where blood backs up into the pulmonary circulation, causing pulmonary congestion and irritation of airway receptors. In isolated RV failure, pulmonary symptoms are usually minimal unless left-sided failure is also present (biventricular failure).
B. Crackles (rales) result from pulmonary edema, which is a hallmark of left-sided heart failure. In RV failure, the lungs are generally not congested, so crackles are not expected unless there is concomitant left ventricular dysfunction.
C. RV failure leads to increased venous pressure in the systemic circulation, causing congestion in the liver (hepatomegaly). This can manifest as right upper quadrant fullness or tenderness, impaired liver function, and in chronic cases, nutmeg liver from long-standing congestion. Other systemic signs include jugular vein distension, peripheral edema (especially in the lower extremities), ascites, and weight gain due to fluid retention.
D. While dizziness can occur in any form of heart failure due to decreased cardiac output, it is nonspecific and is not considered a primary or hallmark sign of right-sided heart failure.
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