4. SEGMENT INFORMATION

The Company has two reportable segments: Food Safety and Animal Safety. The Food Safety segment is primarily engaged in the development, production and marketing of diagnostic test kits, dehydrated culture media and related products used by food producers and processors to detect harmful natural toxins, foodborne bacteria, allergens and levels of general sanitation. The Animal Safety segment is primarily engaged in the development, production and marketing of products dedicated to animal safety, including a complete line of consumable products marketed to veterinarians and animal health product distributors; this segment also provides genomic identification and related interpretive bioinformatic services. Additionally, the Animal Safety segment produces and markets rodenticides, disinfectants and insecticides to assist in the control of rodents, insects and disease in and around agricultural, food production and other facilities.

Neogen’s international operations in the United Kingdom, Mexico, Brazil, China, and India originally focused on the Company’s Food Safety products, and each of these units reports through the Food Safety segment. In recent years, these operations have expanded to offer the Company’s complete line of products and services, including those usually associated with the Animal Safety segment such as cleaners, disinfectants, rodenticides, insecticides, veterinary instruments and genomic services. These additional products and services are managed and directed by existing management, and are reported through the Food Safety segment.

The accounting policies of each of the segments are the same as those described in Note 1.

Segment information follows:


	Food Safety		Animal Safety		Corporate and Eliminations (1)			Total
	(in thousands)
As of and for the three months ended November 30, 2017
Product revenues to external customers	$	44,721	$	40,869	$	—		$	85,590
Service revenues to external customers		4,839		11,388		—			16,227

Total revenues to external customers		49,560		52,257		—			101,817
Operating income (loss)		8,668		10,529		(1,199	)		17,998
Total assets		175,836		215,099		190,093			581,028

As of and for the three months ended November 30, 2016
Product revenues to external customers	$	37,366	$	39,595	$	—		$	76,961
Service revenues to external customers		3,595		10,161		—			13,756

Total revenues to external customers		40,961		49,756		—			90,717
Operating income (loss)		8,883		9,094		(1,125	)		16,852
Total assets		143,901		215,974		127,436			487,311


	Food Safety		Animal Safety		Corporate and Eliminations (1)			Total
	(in thousands)
For the six months ended November 30, 2017
Product revenues to external customers	$	87,004	$	79,153	$	—		$	166,157
Service revenues to external customers		9,291		21,625		—			30,916

Total revenues to external customers		96,295		100,778		—			197,073
Operating income (loss)		17,446		19,198		(2,222	)		34,422

For the six months ended November 30, 2016
Product revenues to external customers	$	73,059	$	76,147	$	—		$	149,206
Service revenues to external customers		7,059		18,097		—			25,156

Total revenues to external customers		80,118		94,244		—			174,362
Operating income (loss)		16,882		16,874		(2,162	)		31,594

(1)	Includes corporate assets, consisting principally of cash and cash equivalents, marketable securities, current and deferred tax accounts and overhead expenses not allocated to specific business segments. Also includes the elimination of intersegment transactions.