What are spherical bacteria?

coccus, plural Cocci, in microbiology, a spherical-shaped bacterium. Many species of bacteria have characteristic arrangements that are useful in identification.

What are spherical bacteria called?

Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla.

Where are coccus bacteria found?

These are nonmotile, nonpathogenic cocci that occur mostly in clusters. They are considered a normal inhabitant of the mouth and upper respiratory tract of humans.

Which are morphological type of bacteria?

They come in four basic shapes: spherical (cocci), rod-shaped (bacilli), arc-shaped (vibrio), and spiral (spirochete) (Figure 1.3(A)). Figure 1.3. (A) Basic shape of bacteria.

Which of the following human diseases is caused by pathogenic bacteria?

Pathogenic bacteria also cause infections such as tetanus, typhoid fever, diphtheria, syphilis, and leprosy. Pathogenic bacteria are also the cause of high infant mortality rates in developing countries.

What bacteria is spiral?

Spirillum (plural, spirilla). A bacterium with rigid spiral (helical) structure (not easily band, not flexible), thick, long, and move with flagella, 6–15 μm long and spiral in shape is called spirillum.

Are spherical bacteria *?

Coccus form:- These are spherical bacteria.

What is the function of coccus bacteria?

They ferment sugars, producing lactic acid as an end product. Many of these species produce carotenoid pigments, which color their colonies yellow or orange. Staphylococcus aureus is a major human pathogen. It can infect almost any tissue in the body, frequently the skin.

What is coccus infection?

Coccus Bacteria Streptococcus often causes throat infections. Other members of the coccus family include Pneumococcus, which causes pneumonia, and Neisseria, which causes gonorrhea. Streptococcus can be further classified into A, B, or nonhemolytic types and aerobic or anaerobic types.

What are the 3 morphological types of bacteria?

Most bacteria come in one of three basic shapes: coccus, rod or bacillus, and spiral.

What are examples of morphological characteristics of bacteria?

Cell shape, nature of multicell aggregates, motility, formation of spores, and reaction to the Gram stain are important. Those morphological features, including the shape and colour of bacterial colonies, are not always constant and can be influenced by environmental conditions.

What is human pathogenic bacteria?

A human pathogen is a pathogen (microbe or microorganism such as a virus, bacterium, prion, or fungus) that causes disease in humans. The human physiological defense against common pathogens (such as Pneumocystis) is mainly the responsibility of the immune system with help by some of the body’s normal flora and fauna.