SKU: F012  / 
    CAS Number: 26469-67-0

    Fosfomycin Calcium

    $119.50 - $143.00

    Fosfomycin Calcium is the calcium salt of Fosfomycin, a broad-spectrum phosphonic acid epoxide antibiotic that inhibits bacterial cell wall synthesis.  It is used against bacteria causing urinary tract and intestinal infections.  It was discovered in Spain in 1969.

    We also offer:

    • Fosfomycin Sodium (F013)
    • Fosfomycin Tromethamine (F043)
    Mechanism of Action Fosfomycin is a phosphoenolpyruvate analogue that irreversibly inhibits enolpyruvate transferase, preventing the formation of N-acetylmuramic acid, which is an essential element of the peptidoglycan cell wall.  It has an extremely low molecular weight, and shows almost no binding to proteins.  It is chemically unrelated to any other known antibiotic.
    Spectrum Active against Gram-positive and Gram-negative bacteria
    Microbiology Applications Fosfomycin  is commonly used in clinical in vitro microbiological antimicrobial susceptibility tests (panels, discs, and MIC strips) against Gram-positive, and Gram-negative microbial isolates. Medical microbiologists use AST results to recommend antibiotic treatment options.  Representative MIC values include:
      • E. coli  0.19 µg/mL – 64 µg/mL
      • Helicobacter pylori  0.05 µg/mL – 12.5 µg/mL
      • For a representative list of Fosfomycin MIC values, click here.

    AST methods include agar dilution, broth dilution, disk diffusion, and Etest techniques (Falagas et al, 2010).

    Eukaryotic Cell Culture Applications Fosfomycin has immunomodulatory effects, altering lymphocyte, monocyte and neutrophil function.  It affects the inflammatory cytokine response in vitro.  It can suppress the production of tumor necrosis factor alpha (TNF-a), interleukin-1B and IL-1a.  In vitro infection models of biofilm have been used, and Fosfomycin alone or in combination, has the ability to penetrate biofilms. 

    Researchers studied chronic biofilm formation by P. aeruginosa due to cystic fibrobris.  P. aeruginosa biofilms were grown on cultured human CF-derived airway cells (CFBE41o-).  CFU per ml was reduced 4 log10 units when given Fosfomycin in combination with Tobramycin at 256 mg/L.  When given at 64 mg/L, initial biofilm formation was inhibited (Anderson et al, 2013).

    Molecular Formula C3H5CaO4P∙H2O

    Anderson GG, Kenney TF, Macleod DL, Henig NR, and O'Toole GA (2013)  Eradication of Pseudomonas aeruginosa biofilms on cultured airway cells by a Fosfomycin/tobramycin antibiotic combination. Pathog Dis. 2013 67(1):39-45  PMD 23620118

    Falagas ME et al (2010)  Antimicrobial susceptibility of Gram-positive non-urinary isolates to FosfomycinInt J Antimicrob Agents 35:497–499  PMID 20226634

    Falagas ME, Vouloumanou EK, Samonis G, Vardakas KZ (2016)  Fosfomycin. Clin. Microbiol. Rev. 29(2):321-347  PMID  26960938

    Hendin D et al (1969)  Phosphonomycin, a new antibiotic produced by strains of Streptomyes. Sci. 166:122-123 PMID 5809587

    Michalopoulos, AS, Livaditis IG and Gougoutas V (2011)  The revival of Fosfomycin. J. Infect. Dis. 15(11): e732 - e739  PMID 21945848