Excess of physical exertion may precipitate facial and eye muscle spasm. It can be due to muscle fatigue. Side effects of certain medicines can produce facial twitching. Drinking excess of coffee, or any other caffeinated drinks can cause involuntary twitching of muscles, facial muscles are one of them.
Blood and organ donors are screened in many endemic areas and, since 2006, in the US to prevent transfusion- and organ transplantârelated Chagas disease. Key Points Chagas disease is caused by Trypanosoma cruzi, which is transmitted by Triatominae (reduviid, kissing, or assassin) bugs. Infection is endemic in South and Central America and Mexico; an estimated 8 million people worldwide, including an estimated 300,000 people in the US (primarily immigrants), are infected.
The incubation period of vector-borne acute Chagas disease is thought to be 7-14 days, but definitive data are not available because persons who live in areas of active transmission are generally continually at risk for exposure to the vectors.cute phase. In most instances of acute T cruzi infection, a specific diagnosis is not made because of the nonspecific nature of the signs and symptoms and because most cases occur in poor people who have limited access to medical care. Acute Chagas disease carries a mortality rate of less than 5%.