Days of Hot Weather in Ottawa. Ottawa usually has 12 days a year with temperatures in the low 30s Celsius. About twice a decade, a day heats up above 35 degrees Celsius (95 Â°F). The 30-degree weather can show up here anytime from June to September, and occasionally as early as April. Days per month in Ottawa over 10, 20 or 30 Â°C.
1 Exotoxins are proteins released by both Gram-positive and Gram-negative bacteria. 2  all major Gram-positives produce exotoxin. 3  except Listeria monocytogenes (produces endotoxin). 4  exotoxins are not heat stable.
Suppose you were feeling ill from a bacterial infection. Chances are the doctor would prescribe an antibiotic and in a few days, you would be feeling better. But there are two main categories of bacteria: gram-positive bacteria and gram-negative bacteria. Unfortunately, gram-negative bacteria are harder to kill with antibiotics. To make matters worse, when gram-negative bacteria are destroyed, say by antibiotics or by our immune system, they release toxins into our body called endotoxins. Endotoxins can make us very sick, and in some cases, even cause death. Where Endotoxins Come From