Interestingly, the ‘germ theory’ of disease was very much in existence for a long duration ;
however, the direct implication and involvement of germs in causing disease was not well established,
and hence recognized and widely accepted.
The magnificent and remarkable success of Louis Pasteur and Robert Koch not only earned
them befitting honours and accolades from their beloved countrymen, but also rewarded them by
bestowing their gratitude in establishing the famous and prestigious Pasteur Institute in Paris (1888),
and Professor of Hygiene and Director of the Institute for Infective Diseases in the University of
Berlin respectively.
At this point in time altogether newer microorganisms (bacteria) were being discovered with an
ever-increasing speed and momentum, and their disease-producing capabilities were adequately established
and proved by Koch’s four cardinal postulates as stated earlier (see section 1.2.4).
In this manner, the domain of ‘medical microbiology’ gradually received a progressive advancement
through the meaningful researches conducted by several scientists and scholars as enumerated
below :
Edwin Klebs (1883) and Frederick Loeffler (1884) : discovered the diphtheria bacillus,
corynebacterium diphtheriae ; and showed that it produced its toxins (poisons) in a laboratory flask.
Emil von Behring and Shibasaburo Kitasato : devised an unique technique of producing immunity
to infections caused by C. diphtheriae by injecting the toxins into healthy animals so that an
antitoxin**** gets developed.
Shibasaburo Kitasato and Emil von Behring : cultivated (grown) the microorganism responsible
for causing tetanus (lockjaw), Chlostridium titani ; and Behring prepared the corresponding antitoxin
for the control, prevention, treatment, and management of this fatal diseas
Interestingly, the ‘germ theory’ of disease was very much in existence for a long duration ;
however, the direct implication and involvement of germs in causing disease was not well established,
and hence recognized and widely accepted.
The magnificent and remarkable success of Louis Pasteur and Robert Koch not only earned
them befitting honours and accolades from their beloved countrymen, but also rewarded them by
bestowing their gratitude in establishing the famous and prestigious Pasteur Institute in Paris (1888),
and Professor of Hygiene and Director of the Institute for Infective Diseases in the University of
Berlin respectively.
At this point in time altogether newer microorganisms (bacteria) were being discovered with an
ever-increasing speed and momentum, and their disease-producing capabilities were adequately established
and proved by Koch’s four cardinal postulates as stated earlier (see section 1.2.4).
In this manner, the domain of ‘medical microbiology’ gradually received a progressive advancement
through the meaningful researches conducted by several scientists and scholars as enumerated
below :
Edwin Klebs (1883) and Frederick Loeffler (1884) : discovered the diphtheria bacillus,
corynebacterium diphtheriae ; and showed that it produced its toxins (poisons) in a laboratory flask.
Emil von Behring and Shibasaburo Kitasato : devised an unique technique of producing immunity
to infections caused by C. diphtheriae by injecting the toxins into healthy animals so that an
antitoxin**** gets developed.
Shibasaburo Kitasato and Emil von Behring : cultivated (grown) the microorganism responsible
for causing tetanus (lockjaw), Chlostridium titani ; and Behring prepared the corresponding antitoxin
for the control, prevention, treatment, and management of this fatal disease
Emil von Behring bagged the Nobel Prize in 1901 in physiology or medicine.
De Salmon and Theobald Smith : proved amply that immunity to a plethora of infectious
diseases may be produced quite effectively and efficiently by proper timely innoculation with the killed
cultures of the corresponding microorganisms.
Elie Metchnikoff : described for the first time the manner certain specific leukocytes (i.e., white
blood cells) were able to ingest (eat up) the disease-producing microorganisms present in the body. He
baptized these highly specific defenders and crusaders against bacterial infections known as phagocytes
(‘eating cells’), and the phenomenon is termed as phagocytosis.
Metchnikoff’s Theory : Based of the aforesaid explanations Metchnikoff put forward a theory
that — ‘the phagocytes were the body’s first and most important line of defense against a variety of
infection’.
Paul Ehrlich : Paul Ehrlich (Robert Koch’s brilliant student) put forward two altogether newer
concepts with regard to the modus operandi whereby the body aptly destroys microorganisms (bacteria),
namely :
(a) Antibody* : The logical explanation of immunity based upon certain antibodies in the
blood, and
(b) Chemotherapy** and Antibiotics*** : Both these aspects virtually opened the flood gates
to the enormous future developments in combating the growth and destruction of pathogenic
bacteria.
Example : Arsphenamine [Salvarsan(R)] : A light yellow organo-metallic compound (powder)
containing about 30% Arsenic (As), was formerly used in the treatment of syphilis.
The two decades stretching between 1880–1900 proved to be indeed a golden era for the ‘science
of microbiology’ to step into adolescence from the stage of infancy. In fact, during this specific
period many researchers have gainfully identified the causative microorganisms duly responsible for the
eruption of a host of infectious human diseases, such as :
Anthrax, Gonorrhea, Typhoid fever, Malaria, Wound infections, Tuberculosis, Cholera, Diphtheria,
Tetanus, Meningitis, Gas gangarene, Plague, Dysentery, Syphilis, Whooping cough, and Rocky
Mountain spotted fever.
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