Warnings. 1  Don't become obsessed with security. 2  Even the most solid lock system is worthless if the frame around the door is weak. 3  If you're not used to locking your doors and you have a door that you can lock without a key, take care to remember your keys whenever you leave the house.
Bacteria that cause urinary tract infections invade bladder cells. Scientists at Washington University School of Medicine in St. Louis have found definitive proof that some of the bacteria that plague women with urinary tract infections (UTIs) are entrenched inside human bladder cells. The finding confirms a controversial revision of scientistsâ model of how bacteria cause UTIs. Previously, most researchers assumed that the bacteria responsible for infections get into the bladder but do not invade the individual cells that line the interior of the bladder.
These cells have a prolonged life span and can thereby remember specific intruders. T cells can also produce memory cells with an even longer life span than B memory cells. The second time an intruder tries to invade the body, B and T memory cells help the immune system to activate much faster. The invaders are wiped out before the infected human feels any symptoms.