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They are caused by Yersinia pestis bacteria spreading from flea bites through the bloodstream to the lymph nodes, where the bacteria replicate, causing the nodes to swell. [3] Plague buboes may turn black and necrotic , rotting away the surrounding tissue, or they may rupture, discharging large amounts of pus . [ 3 ]
The bite is typically painless, but causes itching. [16] Scratching at the bite introduces the T. cruzi-laden feces into the bite wound, initiating infection. [16] In addition to classical vector spread, Chagas disease can be transmitted through the consumption of food or drink contaminated with triatomine insects or their feces. [22]
The Skeeter syndrome should not be confused with another type of reactivity to mosquito bites, severe mosquito bite allergy (SMBA). SMBA is most often an Epstein-Barr virus-associated lymphoproliferative disease that complicates ~33% of individuals with chronic active Epstein-Barr virus infection or, in extremely rare cases, individuals with Epstein-Barr virus-positive Hodgkin disease or an ...
The bubonic and septicemic forms are generally spread by flea bites or handling an infected animal, [1] whereas pneumonic plague is generally spread between people through the air via infectious droplets. [1] Diagnosis is typically by finding the bacterium in fluid from a lymph node, blood or sputum. [2] Those at high risk may be vaccinated. [2]
A bite is defined as coming from the mouthparts of the arthropod. The bite consists of both the bite wound and the saliva. The saliva of the arthropod may contain anticoagulants, as in insects and arachnids which feed from blood. Feeding bites may also contain anaesthetic, to prevent the bite from being felt.
The rest of the evening passed in a blur. We lit the menorah, gave the kids their gifts, and I forgot all about the bump. But in the middle of the night, a throbbing feeling in my shoulder ...
Erysipelas (/ ˌ ɛ r ə ˈ s ɪ p ə l ə s /) is a relatively common bacterial infection of the superficial layer of the skin (upper dermis), extending to the superficial lymphatic vessels within the skin, characterized by a raised, well-defined, tender, bright red rash, typically on the face or legs, but which can occur anywhere on the skin.
Cat-scratch disease (CSD) is an infectious disease that most often results from a scratch or bite of a cat. [4] Symptoms typically include a non-painful bump or blister at the site of injury and painful and swollen lymph nodes. [2] People may feel tired, have a headache, or a fever. [2] Symptoms typically begin within 3–14 days following ...