Many researchers reported rates of infected dogs with T. canis and cats with Toxocara cati all over the world. The degree of tissue damage in the host and the concomitant elicitation of signs and symptoms are varied in different invaded tissues. The liver, lungs and central nervous system, including the eyes, are considered the most sensitive organs. In addition, the number of migrating juveniles and the age of the host. Inflammation manifests as eosinophilic granulomas. The immediate hypersensitivity responses to dying and dead larvae in the viscera, including the lungs, liver and brain, produce symptoms characteristic of VLM.