Tehrani et al. BMC Infectious Diseases (2024) 24:217 BMC Infectious Diseases https://doi.org/10.1186/s12879-024-09065-x R E S E A R C H Open Access Vitamin D deficiency and oral candidiasis in patients with HIV infection: A case?control study Shabnam?Tehrani1,2, Ladan?Abbasian3, Seyed Ali?Dehghan Manshadi4, Malihe?Hasannezhad4, Sara?Ghaderkhani4, Amirreza?Keyvanfar2*, Azar?Darvishi2 and AmirHossein?Aghdaee2 Abstract Background Oral candidiasis is a common opportunistic infection in p...