Final answer:
Children under 2-3 years of age are not typically tested for strep throat due to several reasons, including the rarity of strep throat in this age group and the challenges in diagnosing it. However, there may be exceptions based on individual cases and concerns.
Step-by-step explanation:
Children under 2-3 years of age are not typically tested for strep throat because strep throat is less common in this age group compared to older children and adults. Additionally, diagnosing strep throat in young children can be challenging due to their limited ability to communicate symptoms and the difficulty in obtaining a reliable throat swab sample. However, if a young child has symptoms suggestive of strep throat and there are concerns about the possibility of complications or spread of infection, a healthcare provider may consider testing and treating them.