Oropharyngeal Candidiasis (OPC) and S-ECC

Inclusion Criteria: * Male or female individuals at the age of 9-15-month-old * Must have at least one fully erupted tooth at baseline visit * Parent/guardian willing and able to provide informed consent * With or without a history of OPC (the study team will enroll 35 participants with and 35 participants without a history of OPC) Exclusion Criteria: * Presence of a systemic medical condition (e.g. Down syndrome etc.) * Presence of an orofacial deformity * Presence of dental caries * Use of systemic antimicrobial therapy within 30 days of the baseline visit * Presence of any condition which, in the opinion of the investigator, makes participation in the project not in the individual's best interest.