What is the difference between protozoa and bacteria

Present such as mitochondria and digestive vacuoles etc. Bacteria feed on dead animals and plant materials making it decay. This recycles nutrients. Protozoa feed on bacteria and other smaller microbes by engulfing and then digusting them.

A wide variety of shapes and sizes. Some are elongated, while some are oval. Lactobacillus, nitrogen-fixing bacteria, Bifidobacterium, Helicobacter pylori,. Malaria, dysentery, Giardia an intestinal disease , etc. Seize energy from the same essential sources as humans, including sugars, proteins, and fats.

Some protozoa are photosynthetic. Hence, they can be labelled as extremophiles. Bacteria being parts of many symbioses with multicellular animals, especially on the skin and gut, they pose very important ecological significance. Bacteria possess various morphologies including coccus, bacillus, coccobacillus, and other shapes.

They live either as colonies or singularly. The colonies could be in the forms of either unicellular or multicellular chains. Their cell sizes vary from 0. However, there are very few members with sizes reaching up to micrometres those could be spotted by the naked eye. This highly diverse and abundant group of organisms have a big say in the world. However, the actual number of bacteria species is vastly greater than the number of protozoa species.

Bacteria are extremely small organisms. They are so small that you cannot see them with your naked eye, and need at least times magnification with your microscope to begin seeing them. Identifying bacteria is very difficult since they are very small. Many times scientists have to make a culture of a suspect bacteria to find out what problem the suspect bacteria may have caused.

This culture is allowed to grow in a petri dish and the colony of bacteria is then observed. Bacterial diseases include pneumonia, strep throat, trench mouth, boils, blood poisoning, gonorrhea, chancre sores, bubonic plague, cholera, and syphilis.

Once a virus is attached to a susceptible cell it dissolves a hole through the membrane and uses the cell's processes to reproduce. Diseases that are caused by viruses include the common cold, influenza, herpes, yellow fever, shingles, rabies, polio, and mononucleosis. Protozoa are single celled organisms. Most protozoa do not cause infections, but a few do.

Malaria, dysentery, African sleeping sickness are caused by different species of protozoa. You can then prepare your bacteria colonies by inoculating the agar. CJD can have several different causes. It can be acquired through exposure to the brain or nervous-system tissue of an infected person or animal. Consuming meat from an infected animal is one way such exposure can occur. There have also been rare cases of exposure to CJD through contact with contaminated surgical equipment [4] [5] and from cornea and growth-hormone donors who unknowingly had CJD.

Unfortunately for Cora, CJD is a fatal disease for which there is no approved treatment. Eight months later, Cora dies. Her CJD diagnosis is confirmed with a brain autopsy. Algae is photosynthetic. Cyanobacterium is a prokaryotic microorganism. Viruses are acellular. Yeast is a type of fungal microorganism. Botany is not a subfield of microbiology. Skip to content An Invisible World. Learning Objectives List the various types of microorganisms and describe their defining characteristics Give examples of different types of cellular and viral microorganisms and infectious agents Describe the similarities and differences between archaea and bacteria Provide an overview of the field of microbiology.

How big is a bacterium or a virus compared to other objects? Check out this interactive website to get a feel for the scale of different microorganisms. Think about It What are the two main types of prokaryotic organisms? Name some of the defining characteristics of each type. Think about It Name two types of protists and two types of fungi. Think about It Are helminths microorganisms? Explain why or why not. How are viruses different from other microorganisms? Bioethics in Microbiology In the s, the U.

Key Concepts and Summary Microorganisms are very diverse and are found in all three domains of life: Archaea, Bacteria, and Eukarya. Archaea and bacteria are classified as prokaryotes because they lack a cellular nucleus. Archaea differ from bacteria in evolutionary history, genetics, metabolic pathways, and cell wall and membrane composition.

Archaea inhabit nearly every environment on earth, but no archaea have been identified as human pathogens. Eukaryotes studied in microbiology include algae, protozoa, fungi, and helminths. Algae are plant-like organisms that can be either unicellular or multicellular, and derive energy via photosynthesis.

Protozoa are unicellular organisms with complex cell structures; most are motile. Microscopic fungi include molds and yeasts. Helminths are multicellular parasitic worms. They are included in the field of microbiology because their eggs and larvae are often microscopic. Viruses are acellular microorganisms that require a host to reproduce.

The field of microbiology is extremely broad. Microbiologists typically specialize in one of many subfields, but all health professionals need a solid foundation in clinical microbiology. Multiple Choice Which of the following types of microorganisms is photosynthetic? Think about It Describe the differences between bacteria and archaea.