what is cat scratch fever?

what is cat scratch fever and what causes it?

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  • dedum
    Lv 6
    1 decade ago
    Favorite Answer

    Cat scratch disease is a bacterial infection that typically causes swelling of the lymph nodes. It usually results from the scratch, lick, or bite of a cat — more than 90% of people with the illness have had some kind of contact with cats, often with kittens.

    Bartonella henselae is the bacterium that causes cat scratch disease, and it's found in all parts of the world.Fleas spread the bacteria between cats, although currently there is no evidence that fleas can transmit the disease to humans. Once a cat is infected, the bacteria live in the animal's saliva. Bartonella henselae does not make a cat sick, and kittens or cats may carry the bacteria for months. Experts believe that almost half of all cats have a Bartonella henselae infection at some time in their lives, and cats less than 1 year old are more likely to be infected.

    It typically takes 3 to 10 days for a blister or small bump to appear at the site of a scratch or bite. Lymph node swelling usually begins about 1 to 4 weeks later.

  • 4 years ago

    not a STD, A micro organism "Bartonella henselae", an infection would outcome in Fever, get admission to From a Scratch or chew From a Cat (or another Animal), usually the widely used an infection Is interior the hands, next signal will be Swollen community Lymph Nodes, interior the case of a Hand, Epitrochlear (Sp?) Lymph Nodes

  • Anonymous
    1 decade ago

    Cat scratch disease is usually a self-limited infection by a curved pleomorphic gram-negative, bacteria Bartonella henselae.The bacteria form filaments up to 10 micrometer or longer.

    It is easily seen in tissue sections of the skin, lymph nodes, and conjunctiva, when stained by a silver impregnation technique.

    Cats are the principal reservoir of Bartonella henselae, the etiologic agent in most cases of CSD.

    Infection begins when the organism is inoculated into the skin by the claws of cats and rarely by other animals, or by thorns or splinters.

    Sometimes the conjunctiva is contaminated by close contact with a cat, possibly by licking around the eye.

    Infections are more common in children (80%) than in adults, and there may be clustering when a stray cat or kitten joins a family.

    Most patients have a papule at the site of inoculation, but it may be small and overlooked.

    The papule, which begins 3 to 14 days after inoculation may persist for 8 weeks, is followed by tenderness and enlargement of the regional lymph nodes.

    The nodes remain enlarged for 3 to 4 months and may drain through the skin. About one-half of the patients have other symptoms, including fever and malaise and (rarely) splenomegaly, Parinaud’s oculoglandular syndrome, rash encephalitis (which typically has a sudden onset and sudden resolution), and erythema nodosum. Rare complications of B. henselae infection is bacillary angiomatosis.

    At the site of inoculation the bacteria multiply in the wall of the small vessels and about collagen fibers from which they move through draining lymphatics to regional lymphnodes, where they produce a pyogranulomatous lymphadenitis.

    In early lesions clusters of bacteria expand and obliterate the walls of small vessels.

    The lesions in the skin and lymphnodes progress from abscesses to suppurating granulomas and finally to necrosis.

    Bacteria are abundant in early lesions and rare in late ones.

    Without biopsy and the visualization of the characteristic bacteria, the diagnosis is supported when three criteria are met : i) contact with a cat, a cat scratch, or a primary lesion of the skin or conjunctiva : ii)a positive skin test for cat scratch antigen : ii)and negative results from laboratory studies for other causes of lymphadenopathy.

    Although serologic testing is the reference method for diagnosis, successful use of immunohistochemical (IHC) stain of regional lymph nodes for the diagnosis of CSD has been reported.

  • 1 decade ago

    it's a bacterial infection caused by bartonella heneslae. it is causes a mild infection especially at the site of injury. you can get swollen lymph nodes (glands), fever, and headache. you get it from, surprise surprise...cats, especially kittens. avoid rough play with your cat, control fleas and don't allow them to lick open wounds

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