A reservoir host can harbour a pathogen indefinitely with no ill effects, with important implications for disease control. A single reservoir host may be reinfected several times. A host of predilection is the one preferred by a parasite. An amplifying host is one in which the level of pathogen can become high enough that a vector such as a mosquito that feeds on it will probably become infectious.
Trends in the rates of treatment for ADHD were presented by age, gender, race, family income, and health insurance status. Trends in ADHD treatment were also determined by annual numbers of visits, use of pharmacotherapies, and types of health care professionals. RESULTS: The rate of outpatient treatment for ADHD increased from 0.9 per 100 children in 1987 to 3.4 per 100 children in 1997.
The main medications used to treat ADHD are stimulants and nonstimulants. Sometimes antidepressants are also used. Stimulants are the most common treatment in children and teens. This is usually the type of medication a doctor may try first. Stimulants have been used for a long time and are well-tested. They help the brain control impulses and control behavior and attention.