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.
In the first two decades, the zoo â which had grown to 23 acres in 1902 and was the sixth largest zoo in the nation by 1907 â added a monkey cage, a sealion enclosure, a buffalo pen, an eagle aviary, a small mammal house and in 1910 a zoological society was created in 1910 to help support the growing zoo.