Page 74 - General and Inorganic Chemistry for Advanced Secondary Schools Students Book Form Five and Six

Biology for Secondary Schools

shaped bacteria or cocci (singular is coccus), rod-shaped or bacilli (singular
is bacillus), spiral-shaped bacteria or spirilla (singular is spirillum), and
comma-shaped bacteria or vibrio (singular is vibrion). The following Table
shows various shapes of bacteria.
FOR ONLINE READING ONLY
Table: Groups of bacteria based on their shapes
Shape Group name Examples
Cocci Streptococcus pneumoniae
which causes pneumonia
and Neisseria gonorrhoeae
which cause gonorrhoea

Spherical-shaped bacteria
Bacilli Mycobacterium tuberculosis
that causes tuberculosis

Escherichia coli that is found
in the guts of human beings

Rod shaped bacteria can cause diarrhoea and uri-
nary tract infections
Spirilla Treponema pallidum that
causes syphilis

Spiral-shaped bacteria
Vibrio Vibrio cholerae that
causes cholera

Comma-shaped bacteria
Spirochaetes Borrelia sp. which cause
Lyme disease and relaps-
ing fever
Corkscrew bacteria

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