Crystalline material that blocked a patient's catheter after just 4 days. Crystalline material that blocked a patient's catheter after just 4 days. The.

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Crystalline material that blocked a patient's catheter after just 4 days. Crystalline material that blocked a patient's catheter after just 4 days. The large coffin-shaped crystals were shown by X-ray microanalysis to be a form of magnesium ammonium phosphate (struvite), and the microcrystalline aggregates were shown to be calcium phosphate (apatite). A four-membered bacterial community was isolated from this crystalline biofilm composed of E. coli, P. aeruginosa, E. faecalis, and P. mirabilis. (Modified from reference 390a with permission from Elsevier.)‏ S. M. Jacobsen et al. Clin. Microbiol. Rev. 2008; doi:10.1128/CMR.00019-07