Bacteria: Especially as they are related to the economy of nature, to industrial processes, and to the public healthNewman, George, Sir
Science
Bacteria: Especially as they are related to the economy of nature, to industrial processes, and to the public health
Newman, George, Sir
Bacteria; Bacteriology
From what has been said, it will be clear that anthrax carcasses are
better not opened and exposed to free oxygen. An extended _post-mortem_
examination is not necessary. Burning the entire carcass in a
crematorium would be the ideal treatment. As such is not generally
feasible the next best thing is to bury the carcass deeply with lime
below and above it, and rail in the area to prevent other animals
grazing off it.
A very small prick will extract enough blood to examine for the anthrax
bacilli which are driven by the force of the blood-current to the small
surface capillaries. This occurs, of course, only when the disease has
become quite general, for in the early stage the healthy blood limits
the bacilli to the internal organs. In such cases examination of the
blood of the spleen is necessary.
Anthrax covers a wide geographical area all over the world, and no
country seems altogether exempt. In Germany as many as 3700 animals
have been lost in a single year. About 900 animals were attacked in
1897 in Great Britain.
+Plague.+ This disease, like anthrax and leprosy, has a long historical
record behind it. As the Black Death it decimated the population of
England in the fourteenth century, and visited the country again in
epidemic form in the middle of the seventeenth century, when it was
called the Great Plague. Now, it is highly probable that these two
scourges and the recent epidemic in the East are all forms of one and
the same disease. As a matter of fact, it is difficult to be sure what
was the exact pathology of a number of the grievous ailments which
troubled our country in the Middle Ages, but from all accounts bubonic
plague and true leprosy were amongst them. The former came and went
spasmodically, as is its habit; the latter dragged through the length
of several centuries.
[Illustration: BACILLUS OF PLAGUE]
The distribution of plague at the present time is fortunately a
somewhat limited one, namely, a definite area in Asia known as the
"Plague Belt." From Mesopotamia, as a sort of focus, the disease
spreads northwards to the Caspian Sea, westwards to the Red Sea,
southwards as far as Central India, and eastwards as far as the China
Sea. This constitutes the "belt," but the disease may take an epidemic
form, and is readily, though very slowly, conveyed by infection or
contagion. It appears to be infectious by means of infective dust, and
contagious by prolonged and intimate contact with the plague-stricken.
Rats have been accused of conveying the disease from port to port,
and even infecting man. It is clear that rats are not the only agency
acting in this way. Nevertheless it is true that rats contract the
disease more readily than any other animals, and that when suffering
from it they may spread the infection. How it is thus spread it is not
known. Drs. Cantlie and Yersin have pointed out that previously to an
epidemic of plague rats die in enormous numbers.
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