Anthrax among Canadian Bison
Our recently-joined member, Dallas New, is a Canadian veterinary epidemiologist and last evening she enthralled us with her study of anthrax among bison.
Firstly, she told us something of the history of epidemiology, which began when Dr John Snow found the cause of a cholera outbreak in London.
Then she explained how bison had recovered from near-extinction in North America, and why anthrax is threatening them. All mammals are vulnerable to anthrax, but cattle and bison are particularly intolerant to it.
Anthrax spores move around, but lodge and persist in the soil. For this reason, dead bison have to be cremated rather carefully so as not to release more spores into the ground. This is quite a challenge as bison are huge and fuel has to be brought to the site by helicopter.
Dallas collected data in the Northwest Territories to find out why outbreaks of anthrax poisoning occur in bison populations.
There were three hypothetical causes: spores could be incubating, especially in hot weather and then bursting out; anthrax could be concentrating in bison ‘wallows’; or bison may always carry anthrax but sometimes have low resistance to it.
Many research projects have inconclusive results and this was one of them. It seems likely that outbreaks occur because of all three factors.
Anyway, Dallas clearly enjoyed her spell in the Canadian wilderness and earned a Master’s degree.
Poll: How do you feel about dogs being allowed indoors in cafes?
For most of us, seeing a friendly doggo while out and about instantly brings a smile to our faces. But how do you feel about cafes welcoming pups inside?
Cast a vote and share your thoughts below.
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27.4% I love it!
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32.2% Only in designated areas
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40.4% No, it should be outdoors only.
Happy Tuesday, neighbours, can you figure out today's riddle rush 🏃♂️
A bus driver goes the wrong way down a one-way street. He passes the cops, but they don’t stop him. Why?
Do you think you know the answer to our daily riddle? Don't spoil it for your neighbours! Simply 'Like' this post and we'll post the answer in the comments below at 2pm.
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Companion Walking – Volunteers Needed Whitby and Plimmerton areas
We have lovely seniors waiting to be able to go for a walk with a companion, can you help Age Concern and be part of our team of Volunteers?
Call us if you are keen to help on 04 499 6646 or visit our website
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