A nursing student develops a positive reaction to the tuberculin skin test. A history reveals possible exposure to patients with tuberculosis. A sputum sample is acid-fast negative. When asked for vaccination records, the student reports that childhood vaccination records were lost when the family emigrated from a Southeast Asian country. What is the best explanation for the test results? O The student has been exposed to Mycobacterium tuberculosis or was vaccinated with BCG vaccine (vaccine for TB). O The student is notinfected by Mycobacterium tuberculosis. O l am just not sure. O The student has been infected with Mycobacterium tuberculosis and spreading it to all they come in contact with.

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Respiratory Infections

Respiratory infections are infectious diseases of the respiratory tract that are mostly caused by bacteria and viruses. They cause infections of the throat, sinuses, airway path, and lungs. Respiratory infections are typically divided into two types: upper tract respiratory infection and lower tract respiratory infection.