Causes of Pyometra. Pyometra is an infection that is caused by Escherichia coli, which is a bacterium that is normally present in healthy amounts in the uterus of the dog. When there is an overgrowth of the Escherichia coli bacteria, the uterus infection occurs; this may be 2 months after the estrus.
Central America is not its own continent, but is considered part of North America geographically. Costa Rica, while being in Central America, is technically part of North America. The North American continent ends at either the Panama/Colombia border or the Panama Canal, depending on the convention you accept.
Nicaragua is the largest country in Central America. It is located north of Costa Rica and south of Honduras, between the Pacific Ocean and the Caribbean Sea. With a total area of about 129,494 square kilometers (49,998 square miles), the country is slightly smaller than the state of New York.