Idexx Laboratories, which provides diagnostic tests for livestock and poultry, as well as tests for water and milk-safety, posted higher fourth-quarter earnings per share and reiterated its 2014 revenue-growth outlook.

Westbrook-based Idexx said its fourth-quarter net income totaled $43.2 million, or 82 cents a share, compared with $43.4 million, or 78 cents a share, a year ago. Fourth-quarter revenue rose more than 10 percent to $354.1 million from $319.5 million a year ago.

“I am very pleased with the strong organic growth we achieved in the quarter, reflecting solid gains across our business. Organic growth in recurring companion animal diagnostic revenue was over 11 percent, and strong placements of our premium chemistry and hematology instruments, computer systems, and digital radiography products also contributed to the strong performance,” said Idexx Chairman and Chief Executive Jonathan Ayers.

For the full-year 2014, revenues are expected to be in the range of $1.48 billion to $1.50 billion, compared with full-year 2013 revenue of $1.38 billion.

Earnings per share for the full year are expected to be in the range of $3.76 to $3.86, up from 2013 full-year earnings of $3.48 per share.

Shares of Idexx added $4.64, up 4 percent, to $113.73 in morning trading on Nasdaq.