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Obstinate continuation of characteristic behavior, or of existence despite treatment or adverse environmental conditions.
[L. persisto, to abide, stand firm]
Farlex Partner Medical Dictionary © Farlex 2012


1. Obstinate continuation of characteristic behavior.
2. Survival despite opposition or adverse environmental conditions.
[L. persisto, to abide, stand firm]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


the period of time between a virus being acquired by a VECTOR and its being transferred to a new host.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Patient discussion about persistence

Q. Have you ever heard that vaccines cause autism? If so why such thought persist? Hi my new friends! Hope you are all in good health! Have you ever heard that vaccines cause autism? If so why such thought persist? I look forward to reading all of your answers tomorrow.

A. Yes I heard about that and avoided being injected sometimes. This belief persists because signs of autism may appear around the same time that children receive the vaccine that prevents measles, mumps and rubella, and some parents worry that the vaccine caused the autism.

Q. Can lung cancer be diagnosed on behalf of persistent cough? My father is a heavy smoker. He smoked for all his adult life and he never stopped. In the last few weeks he started to have persistent cough attacks. Can those attacks be the first sign of lung cancer?

A. Smoking can damage the lung in many ways. The fact that someone that is a smoker is suffering from chronic cough doesn't mean that he is suffering from lung cancer. To get a cretin diagnosis you will have to do a chest X-ray.
here is a X-ray with the lesion that might be an actual lung cancer

Q. Headache that won’t go away. Help! Hi, I’m 47 years old man, working as accountant. Yesterday afternoon, I came back home, and after some time I started to feel headache that still going. Is it dangerous? Is it possible I have something like bleeding? I wasn’t hit or injured in anyway in my head before this headache appeared

A. There are two types of headaches: primary headaches and secondary headaches. Primary headaches are not associated with (caused by) other diseases. Examples of primary headaches are migraine headaches, tension headaches, and cluster headaches. Secondary headaches are caused by associated disease. The associated disease may be minor or serious and life threatening. Tension headaches are the most common type of primary headache. Tension headaches are more common among women than men. Migraine headaches are the second most common type of primary headache. Secondary headaches have diverse causes, ranging from serious and life threatening conditions such as brain tumors, strokes, meningitis, and subarachnoid hemorrhages to less serious but common conditions such as withdrawal from caffeine and discontinuation of analgesics. In any case if your headache continues you should see your doctor immediately. Hope this helps.

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References in periodicals archive ?
Numerous factors have been linked to nontraditional students' persistence in higher education.
"Emotet is notorious for its modular architecture, persistence techniques, and worm-like self-propagation that rapidly spread network-wide infection," he said.
Persistence is The Key, focuses on promoting high academic achievement for students of all educational levels from all socioeconomic backgrounds.
The friend didn't help him out of friendship, but "because of [his] shameless persistence" (Luke 11:8).
The key insight is that the evolution of features over parameter choices can be encoded compactly in the form of a barcode or persistence diagram (Figure 4).
With it, we study the influence of smoothing behavior on persistence in Brazil, with focus on how IFRS adoption affected this relation.
Inflation persistence in BRICS countries: A quantile autoregressive (QAR) approach.
The Transcendentist Theory of Persistence, DAMLANO COSTA
Sony has announced another first-person horror game for the PlayStation 4 and PlayStation VR called "The Persistence." The upcoming game, developed by Liverpool-based studio Firesprite includes a unique co-op experience.