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Leukopenia (from Greek λευκός (leukos) 'white' and πενία (penia) 'deficiency') is a decrease in the number of leukocytes (WBC).Found in the blood, they are the white blood cells, and are the body's primary defense against an infection.
The onset of symptoms is sudden, and initial symptoms are predominately non-specific, including fever, chills, headaches, muscle pain, malaise, loss of appetite, lack of energy, and confusion. These are usually accompanied by respiratory symptoms such as a dry cough , sore or dry throat , hoarse voice , and a stuffy or runny nose .
Signs and symptoms of infection are gastritis, burning abdominal pain, weight loss, loss of appetite, bloating, burping, nausea, bloody vomit, and black tarry stools. Infection can be detected in a number of ways: GI X-rays, endoscopy, blood tests for anti- Helicobacter antibodies, a stool test, and a urease breath test (which is a by-product ...
As female scale insects cannot move, they are obligate parasites, permanently attached to their hosts. [16] The sensory inputs that a parasite employs to identify and approach a potential host are known as "host cues". Such cues can include, for example, vibration, [19] exhaled carbon dioxide, skin odours, visual and heat signatures, and ...
Vitamin C taken on a regular basis reduced the duration of severe symptoms but had no effect on the duration of mild symptoms. [120] Therapeutic use, meaning that the vitamin was not started unless people started to feel the beginnings of a cold, had no effect on the duration or severity of the illness. [119]
Fear is an unpleasant emotion that arises in response to perceived dangers or threats.Fear causes physiological and psychological changes. It may produce behavioral reactions such as mounting an aggressive response or fleeing the threat, commonly known as the fight-or-flight response.
A 2018 human volunteer study found that 10 male and female subjects undergoing 4 hours exposures to concentrations of up to 442 mg/m3 and 30 minutes exposures to concentrations of up to 871 mg/m3 in combination with moderate exercise did not show pulmonary function deficits, or signs of ocular irritation, with only slight symptoms of ...