In people with weaker immune systems, or in young children and the elderly, it can be fatal. (sciencedaily.com)
It is extremely important as lack of beneficial bacteria in intestines is one of the key cause of weak immune system! (fullhealthsecrets.com)
Most puppies would not survive 48 hours if they are infected with a bacteria or virus a dead puppy because of their very weak immune system at this early stage. (breedingbusiness.com)