Certification Board of Infection Control and Epidemiology (CBIC) Practice Exam 2025 – The All-in-One Guide for Exam Success

Nonbullous impetigo is primarily associated with Group A streptococcus, which is a bacterium commonly responsible for this skin infection. Nonbullous impetigo is characterized by the presence of small, red sores that quickly rupture, ooze for a short time, and then form a yellowish-brown crust. This type of impetigo is particularly prevalent in children and is spread through direct contact with the sores or contaminated objects.

Group A streptococcus plays a significant role in the pathogenesis of nonbullous impetigo due to its ability to adhere to and invade the skin, causing a localized infection. It is also responsible for other conditions, such as strep throat and scarlet fever, highlighting its prominence as a pathogen in skin and respiratory infections.

While Staphylococcus aureus can also cause impetigo, it is more frequently linked with the bullous form of the infection, which presents differently. Furthermore, Escherichia coli and Enterococcus faecalis are not typically implicated in nonbullous impetigo, as they are more associated with different types of infections or conditions within the gastrointestinal and urinary tracts, respectively. By understanding these associations, it becomes clearer why Group A streptococcus is identified