The other virus that causes herpetic eye disease is herpes simplex type 1, or HSV1. Herpes simplex type 1 is the same virus that causes cold sores on the lips and mouth. In the eye, it usually causes an infection of the cornea called herpes simplex keratitis.
Of the five boroughs, the Bronx is the only one on the U.S. mainland and, with a land area of 42 square miles (109 km 2) and a population of 1,438,159 in 2014, has the fourth largest land area, the fourth highest population, and the third-highest population density.
The zoo (originally called the Bronx Zoological Park and the Bronx Zoological Gardens) opened its doors to the public on November 8, 1899, featuring 843 animals in 22 exhibits. The first zoo director was William Temple Hornaday, who had 30 years of service at the zoo.