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The Jungle Soil That Started Vancomycin
- A missionary named William M. Bo collected jungle soil in Tengeng, Borneo and sent samples to Eli Lilly that eventually yielded vancomycin.
- Bo shipped the crate in 1953 after William W. Conley passed samples to him, unknowingly seeding a drug discovery that saved countless lives.
Mississippi Mud and the Painful First Doses
- Early vancomycin batches were impure "Mississippi Mud" causing painful infusions and toxicity that delayed wider adoption.
- Despite infusion pain and phlebitis in 1954–55, dramatic clinical recoveries (like a saved foot) built the drug's reputation.
Why Resistance Emerged Slowly
- Bacteria struggled to evolve resistance early because vancomycin's bacteriostatic and bactericidal thresholds were very close.
- Repeated exposure produced only 4–8× resistance versus 131,056× for penicillin after 20 exposures.