The document discusses bacteria, including their characteristics, shapes, and roles in causing common human diseases and providing benefits. It describes the three main shapes of bacteria - cocci, bacilli, and spirilla - and examples like streptococci and staphylococci. Examples are given of bacteria that cause diseases like tuberculosis, leptospirosis, anthrax, acne, and pimples. The document also discusses benefits of some bacteria, noting that streptomycin is an antibiotic derived from bacteria, E. coli provides vitamin B12, and lactobacillus and streptobacillus are involved in making yogurt.

1. What comes into
your mind when you
hear the word
bacteria?

3. Kingdom Eubacteria

4. Eubateria characteristics
1.Cell wall
2.True bacteria
3.Cannot survive in extreme environment
Cell wall are made of
1.Peptidoglycan- is responsible for
the rigidity of bacteria
2. Carbohydrate – they only on the
extracellular side of cell wall

5. Basic shape of bacteria
1. Cocci
2.Bacilli
3.Spirilla

6. Cocci- Spherical shape bacterium
- Diplococci- pair of cocci
- Streptococci- Raws or chain of cocci
- Straphyloccoci- grapelike cluster of
cocci

7. Diplococci Streptococci Staphylococci

8. Bacilli- Rod shape
• Streptobacillus also occur in chain

9. Streptobacillus

10. Spirillum- Rod shape and spherical shape

11. Common disease in human
caused by bacteria

12. Propionibacterium acnes- cause pimple
and acne

13. Pimple causes
1. Almost all teens get acne and pimple
“this is part of teens experience”
2. Oily substance called “sebum”

14. Mycobacterium tuberculosis- Cause TB or tuberculosis

15. Leptospira interrogans- Leptospirosis

16. • This bacteria are present in
the urine and tissues of cattle pigs,
horses, dogs, rats and wild animals
• Larges number of leptospira bacteria
are in the urine of rats

17. Bacillus anthracis- Anthrax
“Disease affects animals like cows and carabaos
and can be transmitted to humans”

18. “Year 2000 they use bacillus anthracis
to kill people in USA”

19. Importance of Bacteria

20. Used as antibiotic (Streptomycin) is an antibiotic drug,
the first of class of drug, and it was the first
effective treatment for tuberculosis

21. E. Coli or Escherichia Coli naturally found in the large
intestine of humans. These bacteria meanwhile
provide the much needed vitamin B12

22. Lactobacillus bulgaricus and Streptobacillus thermophilus
Theses are specially involved in making sour milk or
Yogurt. Lactase in the bacteria changes the milk sugar into
Lactic acid, which gives yogurt its semi-liquid texture.

23. Lets watch video clip