Keywords: 16S rRNA; Helicobacter cinaedi; PCR, polymerase chain reaction; TMP-SMX, trimethoprim-sulfamethoxazole; X-linked agammaglobulinemia; XLA, X-linked agammaglobulinemia; chronic cellulitis; granulomatous and suppurative dermatitis; multiple abscesses; primary humoral immunodeficiency; universal microbial polymerase chain reaction.