Which fluid is NOT a direct source of leptospirosis transmission?

Leptospirosis is primarily transmitted through the urine of infected animals, which can contaminate water, soil, and other surfaces. Additionally, placental fluid from an infected animal can be a source of transmission as the bacteria can be present during gestation and at the time of birth. Milk is another fluid that can carry the bacteria, especially in cases where the cow or other mammal is infected and sheds leptospires through their mammary glands.

Saliva is not a direct source of leptospirosis transmission. While the bacteria can be present in the blood of an infected host, saliva is not considered a significant route through which leptospirosis is spread. Understanding the primary transmission pathways helps in implementing better prevention and control measures for leptospirosis, as well as in educating those who may come into contact with potentially infected animals or environments.