The antibiotics are natural substances made by dead organisms.

The antibiotics hinder bacterial increase by entering the_____________.

Antibiotics encourage the growth of resistant genes in the disease-causing bacteria.

When the medicines attack disease-causing bacteria, they also eradicate drug-susceptible harmless bacteria that could otherwise compete with and control the growth of pathogens.

Antibiotics prevent the growth of drug resistant genes in nonpathogenic bacteria.

By encouraging the growth of resistant pathogens, an antibiotic can actually contribute to the spread of the very diseases it is meant to eradicate.

Resistance genes commonly are carried on ____________.

The resistant genes may also occur on the bacterial chromosomes.

Viruses never transfer resistance genes.

Resistance genes are often embedded in small units of DNA, called _______________, which readily get bound to other DNA molecules.

Many bacteria contain specialized transposons, called ______________.

Diseases occur when the pathogenic bacteria outnumber and overwhelm the leucocytes of the host's body.

Taking lower doses of antibiotic will fail to eliminate the disease agent completely. It will also encourage growth of the most resistant strains.

Antibiotics used to treat human infections are widely used in animal husbandry and agriculture.

Patients also should refrain from demanding and doctors should avoid giving, antibiotics for colds and other viral infections. People should try nonantibiotic therapies for minor conditions, such as certain cases of acne.