He also believes that human beings may infect rats.
It can't infect humans, can it?
They appear to be present in large numbers in the soil, and to infect the Leguminous plant by attacking its root-hairs.
It is inadvisable to explore for a suspected abscess with a hollow needle without first opening the abdomen, as septic fluid might thus be enabled to leak out, and infect the general peritoneal cavity.
On each of these host-plants the fungus has become specialized so that the form on barley cannot infect the other three cereals or the wild grasses and so on.