Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
Melissa Conrad Stöppler, MD, is a U.S. board-certified Anatomic Pathologist with subspecialty training in the fields of Experimental and Molecular Pathology. Dr. Stöppler's educational background includes a BA with Highest Distinction from the University of Virginia and an MD from the University of North Carolina. She completed residency training in Anatomic Pathology at Georgetown University followed by subspecialty fellowship training in molecular diagnostics and experimental pathology.
Most infected persons have no apparent ill effects. The acute respiratory disease is characterized by respiratory symptoms, a general ill feeling, fever, chest pains, and a dry or nonproductive cough. Distinct patterns may be seen on a chest x-ray. Chronic lung disease resembles tuberculosis and can worsen over months or years. The disseminated form is fatal unless treated.
Histoplasmosis is a disease, usually affecting the lungs, caused by the
Histoplasma capsulatum fungus. Although many people that are or have been infected
with H. capsulatum do not appear ill, some people in the acute phase of the
disease have a dry cough, fever, and chest pains and do feel ill. There are
several types of histoplasmosis (acute, chronic, and disseminated, all with
subtypes).
H. capsulatum was first described by Samuel Darling in 1906 within human tissue cells
(histiocytes). In 1932, Katharine Dodd and Edna Tompkins made the first diagnosis of
histoplasmosis in an infant. Since the 1930s, H. capsulatum has been found
worldwide, but the majority of cases are found in river valleys in temperate
regions of the world and in equatorial Africa (in Africa, H. capsulatum has a
variant thick-walled yeast form termed H. duboisii). Often an outbreak occurs in
a group of people after a visit to a certain area like a cave that contains bat droppings. In the U.S., histoplasmosis is endemic in the Ohio, Missouri, and
Mississippi river valleys.
Histoplasmosis is the most common endemic fungal infection diagnosed in the U.S.
with about 250,000 new cases per year. H. capsulatum can occur in high
concentrations in some sources (for example, bird and bat feces). Histoplasmosis
has also been named Ohio River Valley fever and bird-fancier's disease.
Histoplasmosis can affect other mammals like dogs and cats, but these animals do
not transfer the disease to humans or to other animals. Dogs, cats, and other
mammals develop symptoms mainly due to lung infections with H. capsulatum that
mimic human histoplasmosis.
Abdominal pain is pain in the belly and can be acute or chronic. Causes include inflammation, distention of an organ, and loss of the blood supply to an organ. Abdominal pain can reflect a major problem with one of the organs in the abdomen such as the appendix, gallbladder, large and small intestine, pancreas, liver, colon, duodenum, and spleen.
Pneumonia is inflammation of one or both lungs with consolidation. Pneumonia is frequently but not always due to infection. The infection may be bacterial, viral, fungal or parasitic. Symptoms may include fever, chills, cough with sputum production, chest pain, and shortness of breath.
Headaches can be divided into two categories: primary headaches and secondary headaches. Migraine headaches, tension headaches, and cluster headaches are considered primary headaches. Secondary headaches are caused by disease. Headache symptoms vary with the headache type. Over-the-counter pain relievers provide short-term relief for most headaches.
Lymph nodes help the body's immune system fight infections. Causes of swollen lymph nodes (glands) may include infection (viral, bacterial, fungal, parasites). Symptoms of swollen lymph nodes vary greatly. They can sometimes be tender, painful or disfiguring. The treatment of swollen lymph nodes depends upon the cause.
Chronic cough is a cough that does not go away and is generally a symptom of another disorder such as asthma, allergic rhinitis, sinus infection, cigarette smoking, GERD, postnasal drip, bronchitis, pneumonia, medications, and less frequently tumors or other lung disease. Treatment of chronic cough is dependant upon the cause.
Although a fever technically is any body temperature above the normal of 98.6 degrees F. (37 degrees C.), in practice a person is usually not considered to have a significant fever until the temperature is above 100.4 degrees F (38 degrees C.). Fever is part of the body's own disease-fighting arsenal: rising body temperatures apparently are capable of killing off many disease- producing organisms.
Chest pain is a common complaint by a patient in the ER. Causes of chest pain include broken or bruised ribs, pleurisy, pneumothorax, shingles, pneumonia, pulmonary embolism, angina, heart attack, costochondritis, pericarditis, aorta or aortic dissection, and reflux esophagitis. Diagnosis and treatment of chest pain depends upon the cause and clinical presentation of the patient's chest pain.
Epilepsy is a brain disorder in which the person has seizures. There are two kinds of seizures, focal and generalized. There are many causes of epilepsy. Treatment of epilepsy (seizures) depends upon the cause and type of seizures experienced.
Obesity is the state of being well above one's normal weight. A person has traditionally been
considered to be obese if they are more than 20 percent over their ideal weight.
That ideal weight must take into account the person's height, age, sex, and
build.
AIDS is the advanced stage of HIV infection. Symptoms and signs of AIDS include pneumonia due to Pneumocystis jiroveci, tuberculosis, toxoplasmosis, seizures, weakness, meningitis, yeast infection of the esophagus, and Kaposi's sarcoma. Anti-retroviral therapy (HAART) is used in the treatment of AIDS.
Pneumonia is a lung infection that can be caused by
different types of microorganisms, including bacteria, viruses, and fungi.
Symptoms of pneumonia include cough with sputum
production, fever, and sharp chest pain on inspiration (breathing in).
Pneumonia is suspected when a doctor hears abnormal
sounds in the chest, and the diagnosis is confirmed by a chest X-ray.
Bacteria causing pneumonia can be identified by sputum
culture.
A pleural effusion is a fluid collection around the
inflamed lung.
Bacterial and fungal (but not viral)
pneumonia can be treated with antibiotics.
What is pneumonia?
Pneumonia is an infection of one or both lungs which is usually caused by bacteria, viruses, or fungi. Prior to the discovery of antibiotics, one-third of all people who developed pneumonia subsequently died fro...
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