In the context of diagnostic accuracy, why is a patient advised to rinse their mouth with water before collecting a sputum specimen?
To neutralize the acidity in the mouth that can destroy pathogenic organisms in the specimen.
To provide a clearer medium for testing, as saliva can interfere with the visibility under microscopic examination.
To reduce contamination from oral bacteria and food particles that may affect the specificity of culture results.
To stimulate saliva production, making it easier for the patient to produce a specimen.