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.
Cold weather is hardly a novelty in Boston, but such periods of deep freeze are mercifully rare. Most winters, there are only a handful of days below 20 degrees. Itâs actually more common to see days in the 50s than days in the teens. How often is it this cold? Only rarely does the high temperature in Boston stay below 20 degrees. In a terrible winter, there might be eight or nine days below 20 degrees, but most years itâs more like three days. Temperatures below freezing are far more common. Generally speaking, one in every four days from December through February is below freezing â still cold, but not quite so numbing.