Abstract

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. The current review discusses the Toxocara sp. infection from the historical background, taxonomy, lifecycle, pathogeneses, clinical signs, epidemiology, diagnosis, control and treatment. And provides an overview of existing literature and data on the Toxocaraiasis with their references.

Highlights

  • In 1952, [3] reported similar cases in a series of children suffered high circulating eosinophilia and severe, long-term, multisystem disease. From this group of patients, they described most of the clinical features of VLM and in histopathological sections of tissues obtained at biopsy, correctly classified the causative agents as the larva of either T. canis or T. cati

  • The disease manifested with fever; enlargement and necrosis of the liver [19]; enlargement of the spleen; lower respiratory symptoms; eosinophilia sometimes raised up to 70% [20] and hypergammaglobulinemia of immunoglobulin M (IgM), IgG, and IgE classes

  • During the last two decades, cutaneous manifestations such as chronic urticaria, chronic pruritus and miscellaneous eczema, in patients with Toxocara antibodies, have been studied by different investigators. These cutaneous manifestations were the only signs indicating the presence of the disease and they were cured after antihelmintic treatment when there was good patient compliance

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Summary

Introduction

Human infection with Toxocariasis was first described by Wilder [2]. The latter he identified a nematode larva of unknown species within a retinal granuloma of a child. In 1952, [3] reported similar cases in a series of children suffered high circulating eosinophilia and severe, long-term, multisystem disease. From this group of patients, they described most of the clinical features of VLM and in histopathological sections of tissues obtained at biopsy, correctly classified the causative agents as the larva of either T. canis or T. cati. Small numbers of reactivated larvae may be shed in the milk

Pathogenesis
Clinical Signs of Toxocara canis in dogs
Visceral Larva Migrans
Ocular Larva Migrans
Cutaneous and covert toxocariasis
Nervous toxocariasis
Prevalence of Toxocara canis in Iraq
Diagnosis of Toxocara canis in dogs
Immuno-serological techniques for diagnosing human toxocariasis
Molecular diagnosis
Treatment
Control measurements
Findings
Conclusion
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