منهج الميكروبيولوجي
الفرقة الأولي شعبة معامل
الفرقة الأولي شعبة معامل
الدراسات التخصصية
Structure of bacterial
cells:
Size, Shape, and Arrangement of bacterial cells:
Size, Shape, and Arrangement of bacterial cells:
Morphology and
arrangement of bacterial cells are criteria used for classification of bacteria
into following groups:
1. Cocci (Singular: coccus).
2. Rods (bacilli), (Singular:
rod, bacillus).
3. Vibrios (Singular:
vibrio).
4. Spirilla (singular :Spirillum)
5. Spirochetes. (Singular:
Spirochaete).
1. Cocci:
These are round or oval
bacteria measuring about 0.5-1.0 micrometer in
diameter. When they
multiplying, cocci may form pairs, chains, or
irregular groups.
Cocci
in pairs are called diplococci, for example, meningococci
and gonococci.
Cocci in chains are called streptococci, for
example Streptococcus pyogens.
Cocci
in irregular groups are called Staphytococci, for example, Staphylococcus
aureus.
2. Rods (bacilli):
These
are stick-like bacteria with rounded, square, or swollen ends. They measure
1-10 micrometer in length by 0.3-1.0 micrometer in width.
It
may arranged in:
A-
Chains, for example, Streptobacillus species.
B-
Branching chains, for example, lactobacilli .
C-
Mass together, for example, Mycobacterium leprae.
D-
Remain attached at various angles resembling Chinese letters, for example, Corynebacterium
diphtheria.
3-Vibrios:
These
are small slightly curved rods measuring 3-4 micrometer
in length by 0.5 micrometers in width.
Most vibrios are motile
with a single flagellum at one end.
They show a rapid
darting motility.
For example:
vibrio
cholerae.
4-Spirochetes:
These
are flexible, coiled, motile organism, 6-20 micrometer in length.
They progress by rapid body movements.
Spirochetes are divided
into three main groups:
A- Treponemes. B- Borreliae. C- Leptospires
Introduction
to Microbiology
Objectives
46-11 Describe how to culture specimen in the
medical office.
46-12
Explain how cultures are interpreted.
46-13 Describe how to perform an
antimicrobial sensitivity determination.
46-14 Explain how to implement
quality control measures in the microbiology laboratory
Introduction
When
microorganisms are pathogenic in nature or displaced from their natural
environment, they cause infections and disease
You
will learn:
·
Processes in
identifying microorganisms
·
Culture medias
used
·
Antimicrobial
testing
·
Quality control
You
must understand different life forms of microorganisms, how they may be
identified, and how to teach proper collection techniques for common specimens
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