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Quantitative assays of biofilm formation on abiotic surface (polystyrene microtiter plate) of clinical strains of K. pneumoniae isolated from patients with tracheostomies. Absorbance values of 0.254–0.509 of OD595nm were classified as moderate biofilm producers. Absorbance values of 0.127–0.254 were considered as weak biofilm producers and values <0.127 were classed as non-biofilm producers.
