**Core Concept**
Impetigo is a highly contagious superficial skin infection characterized by the formation of honey-colored crusts, typically affecting children. It is primarily caused by Staphylococcus aureus or Streptococcus pyogenes, which colonize the skin and cause localized inflammation.

**Why the Correct Answer is Right**
Impetigo is contagious due to the direct transmission of bacteria from an infected individual to a susceptible host. The bacteria produce exotoxins that cause local tissue damage, leading to the characteristic honey-colored crusts. The infection can spread through direct contact or by touching contaminated objects. In addition, impetigo can also be transmitted through respiratory droplets, such as during coughing or sneezing.

**Why Each Wrong Option is Incorrect**
* **Option B:** While impetigo is indeed a bacterial infection, this option is not the best answer choice because it does not address the contagious nature of the disease.
* **Option C:** This option is incorrect because impetigo is highly contagious, making it a significant public health concern.
* **Option D:** While the honey-colored crusts are a hallmark of impetigo, this option is not the best answer choice because it does not address the contagious nature of the disease.
* **Option E:** Impetigo is not caused by a viral infection, but rather by bacterial pathogens.

**Clinical Pearl / High-Yield Fact**
Impetigo is often treated with topical or oral antibiotics, and it is essential to practice good hygiene, such as washing hands frequently and avoiding close contact with infected individuals, to prevent the spread of the infection.

**Correct Answer: A. Contagious**