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Why is knowledge of pathogenesis increased more and more for common bacterial pathogens? Most of these studies lack a near application in disease control such as vaccines or antibiotics.

Examples:

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closed as primarily opinion-based by Corvus, WYSIWYG, jonsca, canadianer, March Ho Mar 12 '15 at 7:25

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Because it is also important to do basic research. It has no goal besides solving questions and is the basis for applied research. $\endgroup$ – Chris Mar 11 '15 at 19:31
  • $\begingroup$ @Chris You should convert that to an answer :) Also it is important to note that these small contributions make it possible to improve the applied part of science. $\endgroup$ – Nandor Poka Mar 11 '15 at 20:39
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Because it is first important to understand a mechanism before you can think about using it for drugs. Take melanoma for example: A large subset of melanoma has a mutated and constitutive active BRAF kinase which permanently signals towards the nucleus and thus deregulates gene expression. Once this mutation was found it was possible to design inhibitors which only work on this specific mutation, which are available in the clinic today.

The same is true for example for activity of antibiotic on bacteria and the fight against resistance. Once it was known that the enzyme beta lactamase inhibits beta lactam antibiotice (penicillin or ampicillin for example) it was possible to find an inhibitor of the enzyme. The clavulanic acid works as a specific inhibitor and has been added to beta lactam antibiotics subsequently to overcome resistance. The same is true for changing antibiotic molecules chemically so they evade the established resistance mechanisms.

The contributions of basic research is the basis for applied research and drug design. Without them, this wouldn't work. Besides that it is also the curiosity of humans which drives science - without having any particular application in mind. These often come much later.

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