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They are live micro organisms that are similar to beneficial micro organisms found in HUMAN GUT. They are ALSO called “ Friendly bacteria ” of “ Good bacteria ”.

They are live micro organisms that are similar to beneficial micro organisms found in human gut. They are also called “ Friendly bacteria ” of “ Good bacteria ”.

The are live micro organisms that are similar to BENEFICIAL micro organisms FOUND in HUMAN gut. They are also called “ friendly BACTERIA ” of “ good bacteria ”.

The are live micro organisms that are similar to beneficial micro organisms found in human gut. They are also called “ friendly bacteria ” of “ good bacteria ”.

It is the transfer of GENETIC MATERIAL between BACTERIA through direct CELL - to - cell contact. This conjugation was discovered in 1946 by Jousua Lederberg and Edwin Tatum.

It is the transfer of genetic material between bacteria through direct cell - to - cell contact. This conjugation was discovered in 1946 by Jousua Lederberg and Edwin Tatum.

They are VIRUSES that changethe BACTERIAL DNA. 

They are viruses that changethe bacterial DNA. 

BAD BREATH is USUALLY due to the BREAK down of proteins by baterica in the MOUTH.

Bad breath is usually due to the break down of proteins by baterica in the mouth.

Certain BACTERIA helps us digest or FOOD. Bacteria in our DIGESTIVE system help to convert milk protein into latic acid and inhabit the GROWTH of potentially harmful bacteria.

Certain bacteria helps us digest or food. Bacteria in our digestive system help to convert milk protein into latic acid and inhabit the growth of potentially harmful bacteria.

Helicobacter PYLON.

Helicobacter pylon.

It is a tail - LIKE STRUCTURE that PROJECTS from the cell body of BACTERIA, which helps the functions in locomotion.

It is a tail - like structure that projects from the cell body of bacteria, which helps the functions in locomotion.

These are a family of anaerobic PHOTO autographic BACTERIA which are non - MOBILE and CAME to spheres, rods and SPIRALS.

These are a family of anaerobic photo autographic bacteria which are non - mobile and came to spheres, rods and spirals.

As these STRUCTURES are often present during chronic bacterial infections or in infections of IMPLANTED medical devices, the bacteria PROTECTED WITHIN the bio - films are much harder to kill than ISOLATED bacteria.

As these structures are often present during chronic bacterial infections or in infections of implanted medical devices, the bacteria protected within the bio - films are much harder to kill than isolated bacteria.

Bacteria often ATTACH to SURFACES and form DENSE AGGREGATION which is CALLED bio - films or bacterial mats.

Bacteria often attach to surfaces and form dense aggregation which is called bio - films or bacterial mats.

Toxin

Toxin

Mycrobacterium leprae.

Mycrobacterium leprae.

G.R. Hanson. 

G.R. Hanson. 

Triponema Pallidum

Triponema Pallidum

Nisseria Gonnorrhea.

Nisseria Gonnorrhea.

Vibrio

Vibrio

SALMONELLA typhosa.

Salmonella typhosa.

The LACTOBACILLUS.

The lactobacillus.

Because they BECOME plasmolysed and CONSEQUENTLY GET KILLED.

Because they become plasmolysed and consequently get killed.

They are classified into the following types of cell, the ovoid or spheroid CALLED coccus, the ROD or cylindrical BACILLUS, the curved VIBRIO and coil shaped spirochaete.

They are classified into the following types of cell, the ovoid or spheroid called coccus, the rod or cylindrical bacillus, the curved vibrio and coil shaped spirochaete.

CLOSTRIDIUM TETANI.

Clostridium tetani.

LOUIS PASTEUR

Louis Pasteur

AZOTOBACTOR 

Azotobactor 

Spoilage of FOOD and COTTON MATERIALS, diseases and denitrification.

Spoilage of food and cotton materials, diseases and denitrification.

STREPTOMYCIN, CHLOROMYCETIN, NEOMYCIN, TERRAMYCIN ETC..

Streptomycin, chloromycetin, neomycin, terramycin etc..

BACTERIA is useful to man in MAJOR fields viz, AGRICULTURE, industry, medicine and biological RESEARCH.

Bacteria is useful to man in major fields viz, agriculture, industry, medicine and biological research.

The BACTERIA which are CAPABLE of synthesining their ORGANIC food from simple organic SUBSTANCES.

The bacteria which are capable of synthesining their organic food from simple organic substances.

Tire bacteria which are UNABLE to SYNTHESISE their organic food from simple organic SUBSTANCES . 

Tire bacteria which are unable to synthesise their organic food from simple organic substances . 

1.  Monotrichous
2.  Lopotrichous
3.  Amphitichous
4.  Deritrichous .
5. All these have FLAGELLA

They are microscopic unicelluar prokaryotic organisms DISTRIBUTED in VARIOUS habits. Most of them lack CHLOROPHYLL and hence lead a heterotrophic MODE of life.

They are microscopic unicelluar prokaryotic organisms distributed in various habits. Most of them lack chlorophyll and hence lead a heterotrophic mode of life.

104cm.

104cm.

KARL Wilhem VON Nigole in 1857.

karl Wilhem Von Nigole in 1857.

BACTERIA .

Bacteria .

FACULTATIVE ANAEROBES.

Facultative anaerobes.

OBLIGATE AEROBES.

Obligate aerobes.

In PLASMA MEMBRANE.

In plasma membrane.

Atrichous.

Atrichous.

FLAGELLA 

Flagella 

COCCUS, BACILLUS, VIBRIO and sprial.

Coccus, bacillus, vibrio and sprial.

ANTON VAN Leeuwenhock in 1676

Anton Van Leeuwenhock in 1676