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5 Cards in this Set

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Brucella species are based on the animals they infect. List 4 species of the organism.
1. Brucella melitensis(goats)
2. Brucella abortus(abortion in cows)
3.Brucella suis(pigs)
4. Brucella canis(dogs)
How do humans contact the disease?
From direct contact with infected animal meat or aborted placentas, or infected milk products.
Brucella penetrates the skin, conjuntiva or lungs or GI tract. Buboes nor a primary skin ulcer appear. TRUE/FALSE
TRUE. Fever usually peaks in the evening and slowly returns to normal by morning. The slow rise in temperature during the day, declining at night, has led to its other name "undulant fever". Symptoms can last from months to years, yet is rarely fatal.
How is it diagnosed?
Best made by culture of the organism from the blood, bone marrow ,liver or lymphnodes. Serum exam may demonstrate elevated anti-Brucella antibodies suggests active disease. Skin test with Brucellergin is available, but a positive result confirms exposure, not necessarily active disease.
What is Pasteurella multocida?
It is a Gram- zoonotic organism. It is not a facultative intracellular organism. It colonizes the mouths of cats, much like Strep. viridens colonizes the human nasopharynx. Therapy is with penicillin.