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Digiscoping waterfowl Typical uncropped digiscope image; the spotting scope has 20x magnification. Camera focal length is 24 mm; distance to the subject is about 90 meters. Digiscoping is a neologism for afocal photography, using a camera to record distant images through the eyepiece of an optical telescope.
The term aseptic meningitis refers to cases of meningitis in which no bacterial infection can be demonstrated. This type of meningitis is usually caused by viruses, but it may be due to bacterial infection that has already been partially treated, when bacteria disappear from the meninges, or when pathogens infect a space adjacent to the ...
When looking at the most common causes of meningitis, 8.3% are due to herpes simplex virus. [8] HSV-2 specifically is the most common cause of meningitis in adults. [6] Herpesviral meningitis primarily affects people aged 35–40, the elderly, and women. [9] Between 20% and 50% of cases have clinical recurrences. [3]
Some of the possible symptoms of chronic meningitis (due to any cause) include headache, nausea and vomiting, fever, and visual impairment. Nuchal rigidity (or neck stiffness with discomfort in trying to move the neck), a classic symptom in acute meningitis, was seen in only 45% of cases of chronic meningitis with the sign being even more rare in non-infectious causes.
[6] [7] Suspicion of meningitis is a medical emergency and immediate medical assessment is recommended. Current guidance in the United Kingdom is that if a case of meningococcal meningitis or septicaemia (infection of the blood) is suspected, intravenous antibiotics should be given and the ill person admitted to the hospital. [8]
Viral meningitis, also known as aseptic meningitis, is a type of meningitis due to a viral infection. It results in inflammation of the meninges (the membranes covering the brain and spinal cord). Symptoms commonly include headache, fever, sensitivity to light and neck stiffness. [1] Viruses are the most common cause of aseptic meningitis.
Additionally, the probability of developing aseptic meningitis increases when patients have a case of mumps or herpes. [2] Symptoms of meningitis caused by an acute viral infection last between one and two weeks. When aseptic meningitis is caused by cytomegalovirus 20 percent of individuals face mortality or morbidity. If left untreated it can ...
Tuberculous meningitis, also known as TB meningitis or tubercular meningitis, is a specific type of bacterial meningitis caused by the Mycobacterium tuberculosis infection of the meninges—the system of membranes which envelop the central nervous system.