Usually bacteria change the pH of the liquid medium during their growth. Do all bacteria cause a change in pH of the growth medium?
yes. All bacteria during their growth in media secrete some metabolites which alter media pH.
I also thinking so, but I have a doubt that whether non sugar fermenting strains will also change the pH
Yes, Bacteria change medium pH. Also those that grow on proteins and aminoacids since they release ammonia from peptides degradation.
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