What is the difference between bacillus coccus and spirillum

An example of bacilli is Escherichia coli , and these live in the intestines of animals and decompose undigested food. They are usually helpful or harmless, but some may cause food poisoning in their hosts. An example of spirilla is Leptospira interrogans, and these bacteria can cause leptospirosis, a disease that may lead to liver damage, but humans are accidental hosts and animals are most commonly infected. If we have helped you, please help us fix his smile with your old essays The basics Environmental issues are particularly difficult to solve because often the solutions require sacrifice….

Bacteria are prokaryotic and unicellular although some join together to form colonies or link up…. All Bacteria have the following characteristics: Unicellular and stick together in colonies Are prokaryotic no…. Tutor and Freelance Writer. Science Teacher and Lover of Essays. Article last reviewed: St. Hi — Wanted to point out a minor correction for the first sentence.

Skip to content. What is Bacilli — Characteristics, Structure, Examples 3. What is the difference between Cocci and Bacilli. Any bacterium, which has either a spherical, ovoid or round-shaped is a coccus. That means, one axis of the bacterium is almost the same as the other. Cocci are found either as a single cell or attached to a surface.

During multiplication, different arrangements of cocci can be found: diplococci, streptococci, staphylococci, tetrads and sarcina. A pair of cocci is called diplococci. Streptococci is a chain of cocci. Irregular clusters of cocci are called staphylococci. Four cocci arrangements in the same plane are called a tetrad. Cuboidal arrangements of eight cocci are called sarcina. Examples of each arrangement of cocci are given in table 1.

Most of the cocci are anaerobic. Several types of infections like bacteremia, cellulitis , pneumonia, gangrene, peritonitis, abscesses, bite wounds and pelvic inflammatory disease are caused by cocci. Cocci can be either gram positive or gram negative. P eptostreptococcus, Streptococcus and Gemella are gram positive cocci. Veillonella is a gram negative cocci. The gram staining of Staphylococcus aureu s is shown in figure 1. Figure 1: Staphylococcus aureus.

Any bacterium which is in rod shape is classified as a bacillus. That means, one axis of the bacterium is longer than the other. Bacillus is mostly arranged as a single bacteria. A single curved rod is called vibrio. Other different shapes of bacilli are filaments, club-shaped rods, spirochetes, spindle-shaped rods, and spirillum.

Examples for each bacilli shapes are given in table 2. During multiplication, different arrangements of bacilli are found: diplobacilli, streptobacilli and coccobacillus.

They are, however, prokaryotic, and some species fix nitrogen in specialized cells called heterocysts see Anabaena.

In general, their size is intermediate between other bacteria and the unicellular protists. Oscillatoria This apparently multi-cellular form consists of ribbon-like chains of cells. Anabaena This form also has chains of cells, but these are smaller and embedded in a gelatinous matrix; note the heterocysts.

Eubacteria For many species of "true" bacteria, the known biology still does not allow a reasonable means of classifying them into groups that are both closely related and recognizable. Examples of common types of Eubacteria include the following: gram negative bacilli Note the color pink is negative and shape bacillus is rod-shaped.

Phylum Spirochetes The spirillum helical shape distinguishes this group of heterotrophic bacteria, which tend to be large for prokaryotes and often possess flagella.