Essay on Microbiology Lab Report

1457 Words Feb 8th, 2013 6 Pages
Lab Report #1: Observing Bacteria Microbiology

This lab exercise familiarized the student with the use of a microscope by observing and identifying various different slides under the microscope. The student practiced observing the given slides under the 10x, 40x, and 100x (oil immersion) objective lenses, which allowed for the identification of the different organism’s shapes and sizes.
The aim of this exercise is to equip the student with the knowledge and skill necessary for conducting microscopic observations. It is also intended to teach the student the various sizes and shapes of several different types of bacteria.
1. Focus the microscope on a slide containing
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Bacteria spirillum – under 40x magnification

Bacteria spirillum – under 100x magnification

* Bacteria coccus.

Under 40x magnification: loads of purple round cells.

Under 100x magnification: paired round purple cells.

Bacteria coccus – under 40x magnification

Bacteria coccus – under 100x magnification

* Bacteria Bacillus.

Under 40x magnification: a view of many pink organisms shaped like rods.

Under 100x magnification: an identical view as the 40x magnification.

Bacteria bacillus – under 40x magnification

Bacteria bacillus – under 100x magnification

4. The microscope was focused on the yoghurt prepared and fresh yoghurt slides and the results were as follows.

* Yoghurt prepared.

Under 40x magnification – a view of purple bacteria whose shape is difficult to make out.

Under 100x magnification – a view of purple rod shaped bacteria/bacilli; some appear as either single rods or paired rods (diplobacillus).

Yoghurt prepared – under 40x magnification

Yoghurt prepared – under 100x magnification

* Fresh yoghurt.

Under 40x magnification – a view of loads of bacteria moving about with undefined shapes.

Under 100x magnification – an indistinct view of loads of varied bacteria moving about, such as diplococci, streptococci, staphylococci, diplobacillus, and streptobacillus.

Fresh yoghurt – under 40x magnification

Fresh yoghurt – under

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