1. Figure 2 - Plastic petri dishes were either coated with mucins derived from stomach- (Gastric Mucins') or salivary gl

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1 Figure 2 Plastic Petri Dishes Were Either Coated With Mucins Derived From Stomach Gastric Mucins Or Salivary Gl 1 (93.28 KiB) Viewed 209 times

1. Figure 2 - Plastic petri dishes were either coated with mucins derived from stomach- (Gastric Mucins') or salivary glands ('Submaxillary Mucins', panel D. 'BSM coated', panel E), or with nothing (Uncoated Polystyrene'). Three different types of bacteria were then 1) applied to these surfaces, 2) allowed time to attach and grow, 3) then washed and stained to quantitate the amount of bacteria able to colonize this surface. Panel D shows photos of the surfaces (Light color spots = growing bacterial colonies. Dark spaces = no bacterial growth). Panel E shows quantitation of this data. (PS: Polystyrene; one type of plastic dish, PMMA: Polymethyl methacrylate, petri dish made with a different type of plastic) D S. pneumoniae S. aureus P. aeruginosa E BSM coated uncoated Uncoated Polystyrene PMMA 2.5 Tror 20 Number of bacteria (1046/cm^2) 15 Gastric Mucins 10 S.aureus S. epidermidis Submaxillary Mucins PS a) What does this data show about the effect on bacterial colonization that mucin molecules can have by themselves (that is, without help from any immune system cells or molecules)? Number of bacteria (10^6/cm^2) S.aureus S. epidermidis b) How does production of mucins by our delicate, thin, vulnerable mucosal tissues help reduce the amount of work that our immune systems have to do?