The clinical course of subcutaneous fungal infections is characterized as:
chronic and insidious
balignant and untreatable
benign and treatable
acute and symptom free
The Correct Answer is A
Subcutaneous mycoses are fungal infections that involve the dermis, subcutaneous tissues, and sometimes the underlying bone. They usually result from the traumatic inoculation of fungi found in soil or decaying vegetation into the skin. These infections are localized and typically do not disseminate to distant organs. Because these fungi grow slowly and evade the immune system effectively, the resulting lesions develop over many months or years.
Rationale:
A. Chronic and insidious is the correct description of the clinical course. These infections, such as sporotrichosis or mycetoma, progress very slowly over time. Patients often ignore the initial painless nodules, leading to a long duration of infection before seeking medical help. This persistent progression is a hallmark of fungal pathogens that inhabit deeper skin layers.
B. "Balignant" (likely a typo for malignant) and untreatable is incorrect. While these infections can be disfiguring and difficult to manage, they are not cancerous (malignant). Most subcutaneous mycoses can be treated with long-term antifungal therapy or surgical debridement, although the treatment duration may last for several months to successfully clear the organism.
C. Benign and treatable is only partially correct. While they are "benign" in a non-cancerous sense, the medical definition of benign often implies a self-limiting or harmless nature. Subcutaneous infections are destructive and can lead to significant tissue loss or secondary infections. They are treatable, but the course is often complex and far from "simple."
D. Acute and symptom-free is incorrect because these infections are explicitly not acute. An acute infection appears suddenly and resolves quickly, whereas subcutaneous mycoses are long-standing. Furthermore, they are not symptom-free; they present with ulcerations, abscesses, and draining sinus tracts that are clinically evident upon physical examination.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Step 1. Convert weight from pounds to kilograms.
187 lbs / 2.2 = 85 kg.
Step 2. Calculate the dose in mg.
85 kg x 6 mg/kg = 510 mg.
Step 3. Convert mg to grams.
510 mg / 1,000 = 0.51 g.
Correct Answer is A
Explanation
The pH scale is a logarithmic measure of the molar concentration of hydrogen ions in a solution. In pharmaceutical compounding, particularly for parenteral administration, maintaining the correct pH is essential for drug solubility and tissue compatibility. A decrease in pH indicates an increase in hydronium ion concentration. Because the scale is logarithmic, a small numerical change represents a significant shift in the chemical environment of the formulation.
Rationale:
A. Ingredient Z is an acid because its addition resulted in a decrease in pH from 7.0 to 5.5. By definition, acids are proton donors that increase the concentration of H+ ions in a solution. A shift toward a lower pH value always signifies an increase in acidity. This change indicates that Ingredient Z released hydrogen ions into the parenteral formulation.
B. If Ingredient Z were neutral, the pH of the formulation would have remained at 7.0. Neutral substances do not alter the proton balance of a solution. Since the pH dropped significantly to 5.5, the substance must have active acidic properties. A neutral substance cannot facilitate a 1.5-unit drop in the pH of a buffered or unbuffered liquid.
C. The statement that the pOH decreased by 1.5 is incorrect. Since pH and pOH must always sum to 14 at 25 degrees Celsius, an increase in acidity (lower pH) results in an increase in pOH. In this case, as the pH decreased by 1.5, the pOH must have increased by 1.5 (from 7 to 8.5). This reflects a decrease in hydroxide ion concentration.
D. The original formulation had a pH of 7, which is considered chemically neutral, not basic. Basic (alkaline) solutions have a pH greater than 7. While a pH of 7 can be part of a basic range in some specific physiological contexts, in pure aqueous chemistry, 7 is the neutral point. Therefore, the starting state was a balanced ionic environment.
E. Ingredient Z cannot be a base because bases are proton acceptors that increase the pH of a solution. If a base were added to a neutral solution (pH 7), the resulting pH would be greater than 7. Bases increase the concentration of hydroxide ions, which would move the pH scale in the opposite direction of the observed 5.5.
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