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.
In this review, we will describe the diversity of mechanisms used by bacterial pathogens to colonize and invade human organs. We will first focus on the capacity of these bacteria to adhere and to proliferate at the surface of host cells and tissues, despite a wide-range of defense mechanisms used by the host.echanisms of bacterial adhesion to host cells. Adhesion of bacteria to host surfaces is a crucial aspect of host colonization as it prevents the mechanical clearing of pathogens and confers a selective advantage towards bacteria of the endogenous flora.