Mycobacterium tuberculosis, the causal agent of this disease, invades macrophages and can replicate inside them. Because invasion of macrophages is a critical step for establishing a mycobacterial infection, there is much interest in understanding the mechanisms for M. tuberculosis entry into macrophages.
January 24, 2016. Winter Storm Jonas did not spare Boston its icy wrath, but the Massachusetts city definitely saw a dulled-down version of the blizzard. According to numbers from the National Weather Service, 8.2 inches fell in Boston, 7 inches accumulated in South Boston and 6.1 inches were dropped in the vicinity of Logan International Airport.
The thermometer on most winter nights in Boston dips to below freezing. Frost can also show up in March, April and November. The city averages one day a year of extreme cold, when the temperature plummets to zero degrees Fahrenheit or less.