Biological Science 6th Edition by Scott Freeman,Kim Quillin,Lizabeth Allison,Michael Black,Greg Podgorski,Emily Taylor,Jeff Carmichael

تمرين 4

When using Koch's postulates, which of the following is an essential requirement for the suspected pathogen?
A) It is present in all organisms with the disease.
B) It can be cultured on an agar plate.
C) It is pathogenic on a wide variety of organisms.
D) It can reproduce sexually within the host.