Bacterial Processes Food SourceRespirationReproduction Favorable conditions Survival

Food Source Photosynthesis – make food using sunlight energy

Food Source Chemosynthesis – make food using energy from inorganic chemicals Hydrogen sulfide

Food Source Parasites – living on or in another living organism

Food Source Saprophytes – live on a dead organism and decompose it

Respiration The breakdown of glucose (food) to release energy AerobicAnaerobic

Respiration Aerobic – use O₂

Respiration Anaerobic – don’t use O₂ hydrogen sulfide and methyl mercaptan

Reproduction AsexualSexual Most bacteria can reproduce either way

Reproduction Asexual – binary fission (split in two) – most common means of reproduction

Reproduction Sexual – produce genetic variety ConjugationTransformation

Conjugation The exchange of genetic material (plasmids) between 2 cells

Conjugation Example -conjugation -conjugation

Transformation Absorption of DNA from the environment

Favorable Conditions Warmth Moisture Darkness Food

Survival Endospores – a dormant stage of a bacterium to survive unfavorable conditions

Advantage over others? Endospore

Negative Effects of Bacteria

Pathogenic – disease causing Bacterial Diseases of Humans

Strep throat

Diptheria

Staph Infection

Tetanus

Gangrene

Pink Eye

Acne

Tooth Decay

Viral or Bacterial Disease? Tetanus

Viral or Bacterial Disease? Smallpox

Viral or Bacterial Disease? Measles

Viral or Bacterial Disease? Pinkeye

Viral or Bacterial Disease? Warts

Viral or Bacterial Disease? Tooth decay

Viral or Bacterial Disease? Staph Infection

Viral or Bacterial Disease? AIDS

Viral or Bacterial Disease? Strep Throat

Viral or Bacterial Disease? Mono

Viral or Bacterial Disease? Common Cold

Viral or Bacterial Disease? Acne

Bacterial Diseases Endotoxins – poisonous chemicals inside the bacteria that aren’t released until the bacteria die Example – typhoid fever, UTI

Bacterial Diseases Exotoxins – poisonous chemicals released from living bacteria as waste Example – acne, tetanus

Food Spoilage Bacteria eat the food and release bad tasting and/or poisonous chemicals

Prevention Refrigerate, freeze, boil and seal, dehydrate, salt

Benefits of Bacteria

Human Body E. coli lives in the colon and breaks down food

Human Body Bacteria cover our skin and eat bad organisms

Fuels Bacteria produce alcohol and methane which are burned for energy

Foods Bacteria help make cheese, cottage cheese, and yogurt

Other Clean up oil spills

Other Sewage treatment

Other Make medicines Insulin antibiotics