Necator americanus hookworm begins its development as a simple egg (2). As the eggs hatch it becomes a rhabditiform larva (2). After the larva molts twice it will penetrate the host skin and getting into the bloodstream (2). It then travels through the bloodstream to the lungs and be coughed up (2). As the larva is being coughed up, it then travels back down to the intestine and molt twice to become an adult (2). Thus the symbiotic relationship begins where the adult hookworm will hook itself onto the walls of the intestine and feed (2). While in the intestine mating occurs and eggs are passed down in the feces of the host (1, 2). Once out the eggs stay in the soil and when another host comes into contact, the life cycle begins all over (1,
