How could e-coli get into the knee?

Is colour blindness an infecious disease like the common cold or influenza? Could you eat angel food cake if you have gout? Is lemon jiice an acid or an alkali? What are the places were protein is digested? Is diabetes an example of a degenerative disease? What are the antibody tests used to screen for syphilis? Does Jim charrey have false teeth? In what cases is catatonia classified as extrinsic? If you just stopped the pill after 10 years and had one regular period but haven't had another one for six weeks does this mean you have not ovulated? How do you catch atopic dermatitis? How many hours of sleep should a teenage girl get? How do you reduce the overharvesting? Can you sleep on your stomach during pregnancy? Are hand bells the same as orchestra bells? Do vaccines destroy viruses only? What can you do to reduce errors when taking vital signs? If you get a cold sore once does that mean you will have herpes for the rest of your life? Why is the respiratory rate considered a vital sign? What two procedures would cause a decrease in the rate of protein digestion? When finding the carotid artery you are looking to check what?