What is the pattern of infection where several microbes grow simultaneously at the infection site? a. systemic infection c. focal infection e. toxemia b. mixed infection d. localized infection?

The pattern is b. Mixed infection.

In clinical bacteriology mixed contamination is the infectious disease which is brought about by an assortment of bacterial species which are concurrent causing a similar disease.

For instance: peritonitis is caused by a wide range of various gut microscopic organisms and yeasts.

Other infections given in the options are:

The infection which affects full body, it is called systemic infection. When the disease causing microorganism affects one particular region it is focal infection.  When one organ system is affected by the pathogens it is an example of localized infection.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

that is wrong, its not thymus.