With the economy shedding jobs and many men long unemployed, poor communities are breeding grounds for such violence.

Company officials quickly discovered that the groups were breeding grounds for fraud and similar abuses.

To complicate matters, hospitals are already breeding grounds for a host of dangerous bugs.

If nothing else, the competitions are breeding grounds for sheer entrepreneurial excitement.

The surfaces can also be breeding grounds for mold.

Pools of stagnant water are breeding grounds for disease.

The beaches are breeding grounds for different species of sea turtles.

Like army camps, cities were breeding grounds for illnesses of all sorts.

It is not surprising, therefore, that these refugee camps are breeding grounds for disease, discontent and disorder.

It said that "neighborhoods in transition are breeding grounds for gangs."