Making the world better, one answer at a time. Rich soil is made up of sand, silt, clay and organic matter (compost) in various stages of decomposition. Humus is the stable remains of decayed organic matter, carbon remains of unknown sorts that attach themselves to clay to improve soil structure. Humus has the ability to increase the soil's water retention, buffer PH , and helps the plant use nutrients although humus is not fertilizer but humic acids and humins.
Salmonellosis, or salmonella, is another bacterial illness that both domestic and wild rats carry. Like leptospirosis, it is spread to humans through contact with urine and feces. In humans, salmonellosis causes gastrointestinal problems such as diarrhea, stomach cramps and fever.
We hear about Rabies, Ringworm, and Lyme disease, but many other diseases pose a threat to humans. 1  Plague: Rodents, cats, rabbits, squirrels, related animals. 2  Tuberculosis: Caused by a bacterium called Mycobacterium tuberculosis. 3  Cat Scratch Fever: Caused by a bacterium called Bartonella henselae.