Causes. Giardia parasites live in the intestines of people and animals. Before the microscopic parasites are passed in stool, they become encased within hard shells called cysts, which allows them to survive outside the intestines for months.Once inside a host, the cysts dissolve and the parasites are released.auses. Giardia parasites live in the intestines of people and animals. Before the microscopic parasites are passed in stool, they become encased within hard shells called cysts, which allows them to survive outside the intestines for months.
On the other hand, those people who eat a lot of processed foods, and/or non-organic foods are susceptible to developing these health issues due to GMOs. For example, about 90% of the corn and soy in the United States is genetically modified. And a lot of processed foods have corn and soy ingredients.
Infectious diseases are caused by small microbes invisible to the eye. The microbes include bacteria, protozoans, fungi, yeast and virus. Of them bacteria and protozoans are the most common disease causing agents.Bacteria cause disease both in plants and animals. While protozoans cause disease only in animals and humans. They are widely rampant and very frequent in causing disease among the public.iseases caused by bacteria; Bacteria causes wide set of diseases by deranging the host physiology. courtesy:wikicommons. Most of the diseases caused by bacteria are life threatening and also damaging to the affected organ. Once infected the common symptoms like fever, weakness are observed by the host.