Adense group of bacteria that are difficult to treat with antibiotics is called a. a biofilm. b. lysogenic. c. a plasmid conjugate.

A

Explanation:

Biofilms are a colony of bacteria that secrete a layer of extracellular matrix (made of polymeric substances of proteins or polysaccharides) that is hard to penetrate with antibiotics. The bacteria in the biofilm also function in coordination and are able to adapt to different factors hence making them hard to eradicate. They can be found in the inside surface of sewage pipes.  

staphylococci bacteria.

Explanation:

A. A biofilm

Explanation:

Biofilms have high bacterial density near to 10000000 CFU/ml bacteria. Due to such high densities, these biofilms becomes resistant to the antibiotics. These biofilms are basically community of microorganisms which stick itself to some kind of surface be it living or non-living. The bacteria’s which get attached to these biofilm and grow in an environment in which they possess both tolerance and resistance towards any bactericidal agent. Due to this functional mechanism of bacterias with in the biofilm, they become resistant to antibiotics.

The correct answer will be biofilm.

Explanation:

Biofilm is an aggregate of micro-organisms formed of one or more types which can grow on different surfaces such as dental plaque formed on the surface of teeth. The biofilm mass is mostly composed of proteins, extracellular polysaccharides (EPS), and DNA.

Bacterial formed biofilms show resistant to antibiotics like biofilm formed by Staphylococcus aureus which causes wound infections. Poly-microbial biofilms are usually more resistant to antibiotics compared to single-species biofilms. EPS present in the biofilm attaches antibiotics.

Thus, biofilm is the correct answer.

Explanation: biofilms are a colony of bacteria that secrete a layer of extracellular matrix (made of polymeric substances of proteins or polysaccharides) that is hard to penetrate with antibiotics.