In Wall Street in these last years we have had one of our periodic outbreaks in financial dementia.

There is almost no contact between the two, and the bitterness that divides them is reflected in periodic outbreaks of violence along the border.

The prairies depend on periodic outbreaks of fire to keep the forest from overgrowing the prairie.

As a result, many young adults are no longer immune, a factor in the periodic outbreaks of measles on college campuses in recent years.

Ten years ago - periodic outbreaks apart - the worst was over.

The ongoing conflict between Cambodia and Thailand over land adjoining the site has led to periodic outbreaks of violence.

In Africa, there have been periodic outbreaks of murder by Lion and Leopard men.

Many workers lived in slum conditions close to where they worked, leading to periodic outbreaks of contagious diseases and severe poverty.

Following 1877 there would be periodic outbreaks of violence but no widespread conflict.

Nigeria suffers from periodic outbreaks of cholera, malaria, and sleeping sickness.