By; Mark Turner

The role of bacteria in our world.

-Some bacteria are used to make antibiotics that kill other bacteria.

-Some Make insulin, which is a substance needed by the body to properly use sugars and carbohydrates.

-Cheese, Yogurt, Buttermilk, and Sour Cream are all made with bacteria.

-Lactic-acid Bacteria make lactic-acid to use as a preservative for some foods.

Killer Protists

-Trypanosoma Protozoa

Members of the genus Trypanosoma are flagellate protozoa that cause sleeping sickness, which is common in Africa. They also cause Chagas disease, which is common in South America. The parasites are spread by insect vectors. Trypanosoma parasites enter a person’s blood when the vector bites. Then they spread to other tissues and organs. The diseases may be fatal without medical treatment.

-Giardia Protozoa

Giardia are flagellate protozoa that cause giardiasis. The parasites enter the body through food or water that has been contaminated by feces of infected people or animals. The protozoa attach to the lining of the host’s small intestine, where they prevent the host from fully absorbing nutrients. They may also cause diarrhea, abdominal pain, and fever. A picture of a Giardia protozoan opens this concept.

-Plasmodium Protozoa

Plasmodium protozoa cause malaria. The parasites are spread by a mosquito vector. Parasites enter a host’s blood through the bite of an infected mosquito. The parasites infect the host’s red blood cells, causing symptoms such as fever, joint pain, anemia, and fatigue


this protist was responsible for a major health crisis in detroit when the city's drinking water became contaminated


Hiv and Aids have affected our world in many different ways. It affects the world on two levels, personal levels and more on the global scale. It has affected me on more of a personal level, when I lost my grandfather to Aids (cancer) when my mom was only 15 years old (I never knew him). But on the more global scale it affects humanity in the way once you have Hiv there is no cure, and it can only spread. The only thing humans can do about this is to take a lot of prescribed medication for the rest of their lives and hope that there is a cure in the feature.