PrionsPrion diseases are rare neuro-degenerative disease that are characterized by longer incubation periods. 1 in 1 million people die from a prion related disease, making the disease fairly rare. Prion diseases can be inherited genetically, sporadically, or through mutation.
Ways of transmission: Through consumption of infected meat. Important Prions: Mad cow disease and Chronic wasting Disease. |
HelminthesThese worms are large, multi-cellular organisms that are generally visible to the naked eye in their adult stages. The worms are most common in impoverish areas with poor hygiene, where the worms are transported through the contact of human feces or bites from dogs or mosquitoes.
Ways of Transmission: (1) ingestion of the eggs or larvae of the worms. (2) ingestion of infected meat containing the worm. (3) Contact with a vector containing the worm - human feces, dogs, infected meat . Important Helminthes: Round worms and Tape worms |
BacteriaBacteria are complex, single-celled creatures with a rigid wall and a thin, rubbery membrane surrounding the fluid inside the cell. Bacteria can also reproduce on their own (asexually) and usually are not harmful, with only 1% of all bacteria causing disease that harms humans. Some harmless bacteria even live in your intestine and help digest food and fight disease.
Ways of transmission: (1) Can spread from person to person, (2) Contaminated food and water (3) Coming into contact with a contaminated surface Important Bacteria infections: E. Coli, Streptococcus, Staphylococcus, black death. |