![]() ![]() ![]() However, the risk can be much greater for the very young, the elderly, and those with immune suppressed systems (e.g., patients receiving chemotherapy, AIDS patients, and organ transplant recipients). In healthy humans, the infections from either organisms are usually self limiting and do not pose serious health risks. They are parasites that cause severe diarrhea, nausea, fever, vomiting, and fatigue in humans. With respect to transmission to humans, Cryptosporidium parvum and Giardia lamblia are the two protozoa shed in animal manure of greatest concern. Protozoa: Many parasites are commonly found in and disseminated with manure, including Cryptosporidium, and Giardia. Several pathogens naturally occur in livestock and poultry manure and under certain circumstances may pose a risk to human health. Pathogens, typically microbes (e.g., bacteria, viruses, protozoa, fungi) or parasitic worms, are organisms capable of causing infection or disease in other organisms, including humans, wild and domestic animals, and plants. Pathogens Soil and dust particles are often colonized by fungal hyphae (white filaments in image) spores and bacteria are also found on dust particles.
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