A disease that spreads by means of germs carried in atmosphere?

Appeared in: MNS 2015

Explanation

An infectious disease is defined as a disease caused by a pathogenic microorganism (a 'germ').
This is a very broad category that includes all modes of transmission, not just one.
The spread of germs through the atmosphere (airborne transmission) is one of several ways an infectious disease can be transmitted.
Therefore, a disease that spreads through the air is, by definition, an infectious disease.

Option B: This term describes the frequency and scale of a disease outbreak (a widespread occurrence), not the method by which the germs are transmitted.
Option C: This term typically refers to a subset of infectious diseases that are spread easily from person to person, most often through direct physical contact or close-range droplets.
Option D: This term describes the constant, predictable presence of a disease within a geographical area or population. It refers to the baseline level of a disease, not its mode of transmission.

Clinical Relevance

Nursing practice connection: Knowing Terminology of Disease Transmission and Epidemiology helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Understanding the mode of transmission is critical for nurses to apply the correct infection prevention and control (IPC) precautions.
For diseases spread through the atmosphere (airborne), nurses must implement airborne precautions. This includes placing the patient in a negative-pressure isolation room and wearing a properly fitted N95 respirator.
Failure to identify and manage airborne transmission can lead to nosocomial (hospital-acquired) outbreaks, endangering other patients and healthcare workers.

How to Approach the Question

First, identify the key concept in the question stem: the method of disease spread is 'by means of germs carried in atmosphere'.
Next, define each of the four options provided.
Recognize that 'Epidemic' and 'Endemic' describe the pattern of disease occurrence in a population (how many people, where, when), not the mechanism of spread. This eliminates options B and D.
Differentiate between the remaining two terms. 'Infectious' is a broad term for any disease caused by a pathogen. 'Contagious' is a narrower term, often implying easy spread through direct contact.
Since 'airborne' is a method of transmission for infectious diseases, and 'Infectious' is the most general and fitting term available, select it as the correct answer.

Concept Tested & Keywords

Q08xJ7Pt2GzsYF8gZ6AnX5

E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart A (pp 26-201 of 604) pp. 86-88, 91-93

Practise the full MNS 2015

Attempt every question from this paper in a timed mock, then review the full solution for each one.