Evaluating the effects of the presence of A. muciniphila in the same fiber-deprived conditions, revealed enrichment of transcripts involved in immunoglobulin production (Igkv12–89, Igkv1-110) and zinc homeostasis (Slc39a4) in the 14SM FF group, which are both associated with infection response; however, it is unclear how increased transcription of these genes might lead to increased susceptibility to infection. The gene discussed is SLC39A4; the disease is infection.