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.
In some extreme cases a single toxin accounts for the principal symptoms of a disease, such as diphtheria, tetanus, and cholera. Bacteria that cause local infections with pus often produce many toxins that affect the tissues around the infection site or are distributed to remote organs by the blood.acterial toxins are subdivided into exotoxins and endotoxins. Exotoxins, which are secreted into the environment as a result of the vital activities of bacteria, are specific in their effect on organisms. Examples include neurotoxins and cytotoxins.