Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam

Which pathogenic organism is commonly detected in throat swab?

1. Herpes

2. Rubella

3. Viruses

4. Streptococcus

The correct answer is: Streptococcus

Throat swabs are commonly used in clinical settings to detect infections affecting the upper respiratory tract. Among the options provided, Streptococcus is especially notable for being the most common pathogenic organism detected in throat swabs, particularly Streptococcus pyogenes, which is responsible for strep throat. This bacterium can lead to symptoms such as sore throat, fever, and swollen lymph nodes, making it important to identify through throat swabbing. Identifying Streptococcus pyogenes early is crucial for prompt treatment, which can alleviate symptoms and prevent complications, such as rheumatic fever. While viruses also play a role in throat infections, they are generally more common causes of viral pharyngitis, which may not require targeted treatment. Herpes and rubella are less directly associated with throat infections; herpes primarily manifests through oral lesions, and rubella, primarily recognized for its rash, is not typically isolated through throat swabs. Thus, the correct choice highlights the significance of Streptococcus as a primary pathogen found in this specific diagnostic context.