Which of the following has emerged as one of the leading organisms responsible for death in AIDS patients?

A. Pneumocystis jiroveci
B. Acanthamoeba
C. Toxoplasma gondii
D. Naegleria


Answer: A

Biology & Microbiology

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A 67- year old patient with severe sepsis undergoes a full infectious work-up upon admittance to the intensive care unit. Cultures of urine, blood, sputum and cerebral spinal fluid are obtained. The cultures do not yield a specific organism, so further analysis of the sample is done to determine the characteristics of the microorganism. The metabolic processes are analyzed in the lab The organism is found to grow throughout the entire tube of broth media. Which of the following terms best describes the oxygen requirement of this organism.

a) obligate aerobe b) microaerophile c) facultative anaerobe d) obligate anaerobe

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Rubbing a substance on uncoated paper should reveal if it contains

(a) lipid. (b) carbohydrate. (c) protein. (d) sugar.

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Thyroxine is released from the thyroid gland in response to the presence of

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