ATI RN
Microbiology Test Bank Questions
Question 1 of 5
According to the data of WHO, for about 250 mln of Earth population fall ill with malaria. This disease is mostly spread in tropical and subtropical regions. Range of its spread falls into the area of the following mosquitoes:
Correct Answer: A
Rationale: Step-by-step rationale: 1. Anopheles mosquitoes are the primary vectors for transmitting malaria. 2. They prefer stagnant water for breeding, common in tropical regions. 3. Culex mosquitoes primarily spread diseases like West Nile virus. 4. Aedes mosquitoes transmit diseases like Zika and dengue fever. 5. Mansonia mosquitoes are known for transmitting filarial diseases. Therefore, the correct answer is A (Anopheles), as they are specifically associated with spreading malaria.
Question 2 of 5
A 21-year-old female patient consulted a gynecologist about itching, burning, watery vaginal discharges with a fish-like smell. Speculum examination revealed that the cervical and vaginal mucosa was of a normal pink color. Vaginal examination revealed no alterations of the uterus and appendages. Gram-stained smears included clue cells. What is the most likely pathology?
Correct Answer: A
Rationale: The correct answer is A: Bacterial vaginosis (gardnerellosis). The presence of clue cells on the Gram-stained smears is characteristic of bacterial vaginosis. Clue cells are vaginal epithelial cells covered with bacteria, specifically Gardnerella vaginalis, which is the causative agent of bacterial vaginosis. The symptoms described by the patient - itching, burning, watery discharge with a fish-like smell - are classic signs of bacterial vaginosis. The absence of alterations in the cervix, uterus, and appendages rules out other sexually transmitted infections like chlamydiosis, gonorrhea, and trichomoniasis. Therefore, the most likely pathology in this case is bacterial vaginosis.
Question 3 of 5
A 42-year-old patient with gastric ulcer has a disbalance between the aggressive and defensive factors. Which of the following factors contributes to the development of gastric ulcer?
Correct Answer: A
Rationale: The correct answer is A: Helicobacter pylori. This bacterium is a major cause of gastric ulcers by disrupting the balance between aggressive (acid, pepsin) and defensive (mucus, bicarbonate, prostaglandins) factors in the stomach lining. H. pylori infection leads to inflammation, weakening the protective mucosal barrier, making the stomach more susceptible to damage. Choices B, C, and D are defensive factors that help protect the stomach lining and prevent ulcer formation, so they do not contribute to the development of gastric ulcers.
Question 4 of 5
After long-term antibiotic treatment a patient has developed whitish spots on the oral mucosa. Gram- positive oval budding cells were detected in the smear preparations. What causative agents were detected?
Correct Answer: A
Rationale: The correct answer is A: Candida fungi. Candida fungi are known to cause oral thrush, characterized by whitish spots on the oral mucosa. The presence of gram-positive oval budding cells in the smear preparations is indicative of Candida species. Staphylococci (choice B) are gram-positive cocci, not oval budding cells. Sarcinae (choice C) are gram-positive bacteria that form cuboidal packets, not oval budding cells. Actinomycetes (choice D) are filamentous gram-positive bacteria, not oval budding cells like Candida fungi.
Question 5 of 5
Routine investigation of microbiological sanitary condition of air in a hospital is performed once in 3 months. What microorganism is the sanitary indicator of air condition in an enclosed space?
Correct Answer: D
Rationale: The correct answer is D: P.aeruginosa. This bacterium is commonly found in water and soil, making its presence in indoor air an indicator of poor sanitation. Step 1: P.aeruginosa is an opportunistic pathogen known to cause infections in hospitals. Step 2: Its presence in the air indicates potential contamination and poor air quality. Step 3: Regular monitoring of P.aeruginosa levels can help assess the effectiveness of sanitation measures. Summary: A, B, and C are not suitable indicators of air sanitation in an enclosed space as they are not typically associated with environmental contamination or poor air quality.