Search results
Results from the WOW.Com Content Network
Tuberculosis is spread from one person to the next through the air when people who have active TB in their lungs cough, spit, speak, or sneeze. [1] [9] People with latent TB do not spread the disease. [1] Active infection occurs more often in people with HIV/AIDS and in those who smoke. [1]
A misconception is that M. tuberculosis can be spread by shaking hands, making contact with toilet seats, sharing food or drink, or sharing toothbrushes. However, major spread is through air droplets originating from a person who has the disease either coughing, sneezing, speaking, or singing. [17]
Since they were previously exposed, the immune system’s memory T cells quickly release cytokines to try and control the new outbreak, which forms more areas of caseous necrosis, this time, though, it tends to cavitate, or form cavities, which can allow the bacteria to disseminate, or spread through airways and lymphatic channels to other ...
Tuberculosis can also spread through the blood from the primary focus to elsewhere in the abdomen. Abdominal solid organs, kidneys, lymph nodes and peritoneum can be affected this way. [ 2 ] Tuberculosis is also reported to spread to the peritoneum directly from adjacently situated infected foci, such as from the fallopian tubes, adnexa, psoas ...
An infectious disease agent can be transmitted in two ways: as horizontal disease agent transmission from one individual to another in the same generation (peers in the same age group) [3] by either direct contact (licking, touching, biting), or indirect contact through air – cough or sneeze (vectors or fomites that allow the transmission of the agent causing the disease without physical ...
Bacteria enter the body through inhalation and are ingested by white blood cells called macrophages. [1] Surviving bacteria multiply and can spread to other areas of the body. This can occur through the lymphatic system , blood, or via direct spread from infected tissues.
Mycobacterium tuberculosis is the most common cause of both pulmonary tuberculosis and tuberculous lymphadenitis. [1] [6] Historically, transmission of Mycobacterium bovis from dairy consumption was another frequent cause of tuberculous lymphadenitis, but incidence has drastically decreased in developed countries since the advent of pasteurization and other efforts to prevent bovine ...
Some infectious diseases can be spread via respiratory droplets expelled from the mouth and nose, as when a person sneezes. A respiratory droplet is a small aqueous droplet produced by exhalation, consisting of saliva or mucus and other matter derived from respiratory tract surfaces. Respiratory droplets are produced naturally as a result of ...