<prompt> Definitive host of ascariasisDogManPigMonkey  <response>: Ref: Harrisons, 19th ed. pg. 1413 Ascaris lumbricoidesis the largest intestinal nematode parasite of humans, reaching up to 40cm in length. Humans are definitive host of ascaris Clinical disease arises from larval migration in the lungs or effects of the adult worms in the intestines. Clinical Features: Around, 9-12 days after egg ingestion, patients may develop an irritating non-productive cough and burning substernal discomfort that is aggravated by coughing or deep inspiration. Eosinophilia develops during this symptomatic phase and subsides slowly over weeks. Chest x-rays may reveal evidence of eosinophilic pneumonitis Lofflers syndrome, with rounded infiltrates a few millimeters to several centimeters in size. Treatment: Mebendazole DOC 