Final answer:
The major sources of T. gondii infection include fecal contamination, infected meat, and contaminated soil or cat litter, but not bloody body fluids.
Step-by-step explanation:
The major sources of increasing human infection with Toxoplasma gondii include fecal contamination of food with T. gondii organism, ingestion of undercooked infected meat, and handling of contaminated soil or cat litter. However, the option that is not a major source of human infection with T. gondii is bloody body fluids. This protozoan parasite is not transmitted through blood, unlike other pathogens such as HIV or hepatitis viruses. T. gondii infections are typically associated with cat feces or undercooked meat from other infected animals, not with blood or blood products.
There is no significant evidence that T. gondii is transmitted through raw, infected milk, which is different from other parasites like Giardia lamblia.