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.
enterotoxin. 1. a toxin specific for the cells of the intestinal mucosa. 2. a toxin arising in the intestine. 3. an exotoxin that is protein in nature and relatively heat-stable, produced by staphylococci.ost enterotoxins are produced by certain species of bacteria, such as Staphylococcus. Infectious disease A toxin with a direct effect on the intestinal mucosa, eliciting net fluid secretion; the 'classic' enterotoxin is cholera toxin, which evokes intestinal fluid secretion, by activating adenylate cyclase.