See Also: Koch's phenomenon(medicine)
Koch(dictionary)
Koch's law(medicine)
Koch, Robert(medicine)
Koch, Walter(medicine)
Koch's postulates(medicine)
Koch's bacillus(medicine)
Koch's triangle(medicine)
Koch's node(medicine)
Koch-Weeks bacillus(medicine)

pacu (iou) and Koch's phenomenon (medicine)


pacu (iou)



pacu noun. [pa'ku:, 'paku:] L18.
[Tupi pacu.]
Zoology. A large herbivorous freshwater fish of the characin family, Colossoma nigripinnis, of northern S. America.

Koch's phenomenon (medicine)


Koch's phenomenon


The phenomenon of infection immunity; living tubercle bacilli (Mycobacterium tuberculosis) do not cause reinfection when inoculated into tuberculous guinea pigs (i.e., the animals are "immune" to reinfection) even though the original infections continue to develop and eventually cause death of the animals, rise of temperature and increase of the local lesion, in a tuberculous subject, following an injection of tuberculin.