Ancylostoma braziliense

Ancylostoma braziliense

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Overview

Ancylostoma braziliense is a species of hookworm that primarily infects canines and felines. It is a member of the family Ancylostomatidae and is known for causing cutaneous larva migrans in humans, a condition characterized by serpiginous skin eruptions. This parasite is prevalent in tropical and subtropical regions, particularly in areas with warm, moist climates.

Morphology

The adult Ancylostoma braziliense is a small, cylindrical worm. Males typically measure about 7-9 mm in length, while females are slightly larger, ranging from 9-11 mm. The anterior end of the worm is equipped with a buccal capsule containing two pairs of teeth, which are used to attach to the host's intestinal wall and feed on blood.

Life Cycle

The life cycle of Ancylostoma braziliense involves both free-living and parasitic stages. Eggs are passed in the feces of infected animals and hatch in the environment under favorable conditions. The larvae undergo two molts to become infective third-stage larvae (L3), which can penetrate the skin of a suitable host. Once inside the host, the larvae migrate to the lungs, ascend the trachea, and are swallowed, eventually reaching the small intestine where they mature into adults.

Pathogenesis

In its definitive hosts, Ancylostoma braziliense can cause anemia and enteritis due to blood loss from feeding. In humans, the larvae are unable to complete their life cycle but can cause cutaneous larva migrans, also known as "creeping eruption." This condition results from the larvae migrating through the skin, causing intense itching and a characteristic winding rash.

Epidemiology

Ancylostoma braziliense is found in tropical and subtropical regions, including parts of South America, Central America, and the Caribbean. It is commonly associated with sandy soils, such as those found on beaches, where infected animals defecate and contaminate the environment.

Prevention and Control

Preventing infection with Ancylostoma braziliense involves regular deworming of pets, proper disposal of animal feces, and avoiding contact with contaminated soil or sand. Wearing shoes and protective clothing can reduce the risk of skin penetration by larvae.

Related Pages

• Hookworm
• Cutaneous larva migrans
• Ancylostomatidae
• Parasitic diseases