1)STRUCTURE,LIFE CYCLE OF FLEAS 2)THE EPIDEMIOLOGICAL IMPORTANCE OF HUMAN FLEAS презентация

1)STRUCTURE ,LIFE CYCLE OF FLEAS 2)THE EPIDEMIOLOGICAL IMPORTANCE OF HUMAN FLEAS MEDICAL ACADEMY NAMED BY S.I GEORGIEVSKIY “CFU NAMED BY V.I. VERNADSKIY” DEPARTMENT OF MEDICAL BIOLOGY 1ST COURSE STUDENTS: PRAKASH AKSHA RAMESH CHANDRA KANTHAN MOSES ALBERT LA-1 195-A SCIENTIFIC LEADER:SVETLANA SMIRNOVA

FLEAS:

STRUCTURE OF FLEAS: Fleas are tiny, but anyone who has seen one can usually recognize them with ease. They're tiny, flat, wingless insects that have a knack for jumping away before you can catch them. Their bodies are covered with hard plates called sclerites, so if you do catch one, squashing it can be a challenge. Their hard outer shell protects fleas from everything from an animal's teeth to hitting the floor after a long jump.

To the naked eye, a flea's exoskeleton seems completely smooth, but it's really covered in tiny hairs that point away from the flea's head. Their flattened bodies and these backward-pointing hairs make it easy for fleas to crawl through their hosts' fur. But if something tries to dislodge them, the hairs act like tiny Velcro anchors. This is why a fine-toothed comb removes fleas better than a brush does. The teeth of the comb are too close together for fleas to slip through, so it can pull them from the host's hair, regardless of which way fleas' hairs are pointing.

A flea also has spines around its head and mouth – the number and shape vary according to the flea's species. The mouth itself is adapted for piercing skin and sucking blood. Several mouthparts come together to form a needlelike drinking tube.

LIFE CYCLE OF FLEAS:

EPIDEMIOLOGICAL IMPORTANCE OF HUMAN FLEAS

Some diseases by human fleas… Tungiansis Murine typhus Tularemia Bubonic plague

Flea associated allergies.. Flea saliva can cause skin dermatitis in humans, which usually appears on patches of skin as itchy bumps or a rash. Some people can have asthmatic-type reactions when they inhale flea feces. Pets can also react to flea bites and will commonly develop a flea hypersensitivity or flea-bite dermatitis. As a result, animals may develop crusty lesions and may constantly scratch at their skin, often leading to fur loss.

signs and symptoms of a flea bites in humans Red spots with a halo. Itching. Hives. Rash (characterized by small clusters of bumps) Swelling around the bite.

Treatment for flea bites Resist the urge to scratch. Wash the bites with antiseptic soap to reduce the risk of infection. Apply an icepack frequently to help relieve swelling. Use calamine lotion, anaesthetic creams or similar to treat the itching. See your pharmacist for advice on appropriate antihistamine medications to reduce the swelling.

Diagnosis Identification of fleas is performed with the use of light microscopy and taxonomic keys.

PREVENTION Clean animal bedding and the general surrounds thoroughly. Vacuum the carpets. Throw away the vacuum cleaner bag, since it will contain fleas and eggs, or use a surface spray into the bag. Use an appropriate spray or ‘flea bomb’ in your house, taking care to follow the label directions carefully. A persistent infestation may need to be treated by a qualified pest control operator. Maintain hygiene practices

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