KINGDOM : MONERA - THE BACTERIA – Members now divided into two separate Kingdoms a) Archaebacteriab) Eubacteria Approximately 30,000 Species Have been.

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Presentation transcript:

KINGDOM : MONERA - THE BACTERIA – Members now divided into two separate Kingdoms a) Archaebacteriab) Eubacteria Approximately 30,000 Species Have been Identified, but Scientists estimate that several million species have not been identified Harvard Dental School found 615 different bacteria within the mouth

Bacteria – are unicellular prokaryotes. Prokaryotic cells are smaller, simpler and more primitive than eukaryotic cells. Eukaryotic cells make up the organisms found in the other four kingdoms – Protista, Fungi, Plantae and Animalia

When it comes to classifying and naming bacteria, they tend to be classified according to their cell shape and by the way they grow. Some grow in chains others in sheets

The Three Most common shapes are : BACILLUS – Rod Shaped (stained pink) COCCUS – Spherical Shaped (stained purple) SPIRILLUM – Spiral Shaped (stained blue)

Another method used for classifying bacteria, is based on the type of cell wall they possess. Some bacteria have thicker cell walls and they absorb and maintain a purple stain – “GRAM POSITIVE” Some bacteria with a thinner cell wall absorb and maintain a pink stain – “GRAM NEGATIVE” - PINK – Think – Thin - Negative

WHY STUDY BACTERIA?

Worldwide, bacterial infections are responsible for more deaths than any other cause. Bacteria are generally spread from an already infected person to the newly infected person. The most common invasion routes are inhalation of airborne bacteria, ingestion into the stomach from dirty hands or utensils, or through contaminated food or water, direct contact with an infected area of another person's body, contaminated blood, or by insect bite. Leprosy – Hansen’s Disease

Any of these sound familiar? Pink Eye Lyme’s Disease Botulism and other types of food poisoning

ANTIBIOTICS : Chemicals that kill bacteria Tend to kill bacteria by preventing them from making their cell wall or by shutting down their ribosomes which synthesize necessary proteins.

THERE IS NOTHING GOOD ABOUT BACTERIA ! WRONG