Disease, cat scratch: A bacterial infection due to a cat scratch seen most often today in people with HIV. The disease characteristically presents with swollen lymph nodes (lymphadenitis), sore throat, fatigue, and fever, chills, sweats, vomiting, loss of appetite, and weight loss. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. Then more nodules appear on and under the skin. As the number of nodules increases, patients get sicker.
In normal people the disease is self-limited and usually goes away by itself in a few weeks. It can also be treated with antibiotics. In persons with HIV/AIDS the disease (usually called bacillary angiomatosis) can cause severe inflammation of the brain, bone marrow, lymph nodes, lungs, spleen and liver. The disease can be fatal in persons with HIV. It can be easily treated with antibiotics such as erythromycin and doxycycline. Treatment is given until the skin lesions resolve, usually in 3 to 4 weeks. Bacillary angiomatosis is so characteristic today of AIDS that it is an AIDS defining disease, according to the CDC (Centers For Disease Control).
A cat carrying the microbe does not show symptoms. It is not necessary to get rid of the cat. If someone in the household is at high risk, a test to detect the infection can be done and the cat can be treated. The disease is caused by a bacterium called Rochalimaea henselae, which was reclassified as Bartonella henselae, named for Diane Hensel, a microbiologist. The disease has also been called cat scratch fever, regional lymphadenitis, and benign lymphoreticulosis.
- Disease, chronic obstructive pulmonary (COPD)
Any disorder that persistently obstructs bronchial airflow. COPD mainly involves two related diseases — chronic bronchitis and emphysema. Both cause chronic obstruction of air flowing through the airways and in and out of the lungs. The obstruction is generally permanent and progresses (becomes worse) over time. Asthma is also a pulmonary disease in which there […]
- Disease, chronic obstructive lung (COLD)
Disease, chronic obstructive lung (COLD): Any disorder that persistently obstructs bronchial airflow. COLD mainly involves two related diseases — chronic bronchitis and emphysema. Both cause chronic obstruction of air flowing through the airways and in and out of the lungs. The obstruction is generally permanent and progresses (becomes worse) over time. In asthma there is […]
- Disease, clinical
Disease, clinical: A disease with clinical signs and symptoms that can be recognized. As distinct from a subclinical illness without recognizable clinical manifestations. Diabetes, for example, can be subclinical in a person before emerging as a clinical disease.
- Disease, Conor and Bruch
Disease, Conor and Bruch: African tick typhus, one of the tick-borne rickettsial diseases of the eastern hemisphere similar to Rocky Mountain spotted fever but less severe. Characteristic features include fever, a small ulcer (tache noire) at the site of the tick bite, swollen glands nearby (satellite lymphadenopathy), and a red raised (maculopapular) rash. Also called […]
- Disease, Creutzfeldt-Jakob (CJD)
Disease, Creutzfeldt-Jakob (CJD): A dementing disease of the brain. It is believed due to an unconventional (not a bacteria or virus), transmissible agent called a prion. Symptoms of CJD include forgetfulness, nervousness, jerky trembling hand movements, unsteady gait, muscle spasms, chronic dementia, balance disorder, and loss of facial expression. CJD is classified as a spongiform […]