Disease Causative Agents

Theobald Smith demonstrated in 1892 that Texas cattle fever (also called tick fever) was transmitted by ticks - specifically cattle ticks (Boophilus annulatus). This was groundbreaking proof that arthropods could transmit disease, establishing the field of vector-borne disease transmission. His work showed that neither mice, sneezing, nor syringes were responsible - the disease spread through insect bites. This discovery was crucial for understanding disease transmission mechanisms.

Varicella is the medical term for chickenpox, a highly contagious viral infection caused by the varicella-zoster virus. It primarily affects children and causes an itchy rash and red spots. Option B 'Rabbies' is a typo for rabies, and option C 'Tuberclosis' is a typo for tuberculosis.

SIDS stands for Sudden Infant Death Syndrome, the unexplained death of a baby under 1 year during sleep. It remains a mystery despite research. Option A (incident) is incorrect - it's about infants, not incidents. Option B (disease) is wrong - no disease process is identified. Option C (infact) is a typo for infant.

Bronchitis is inflammation of the bronchial tubes, which are the air passages that carry air to and from the lungs. It is a respiratory tract disease affecting the bronchi, not the blood, bladder, or liver.

Oncology is the branch of medicine that deals with the prevention, diagnosis, and treatment of cancer. The term comes from the Greek 'onkos' meaning bulk or mass.

Tetanus is caused by the bacterium Clostridium tetani. The bacteria produce a powerful neurotoxin called tetanospasmin that causes muscle spasms and lockjaw. It is not caused by fungi (A), viruses (B), or insects (D).

Liquid laundry detergents do not contain living organisms, meaning they are not alive. Instead, they contain manufactured chemical enzymes that help break down protein and grease stains.

SARS stands for Severe Acute Respiratory Syndrome, a viral respiratory illness caused by the SARS-associated coronavirus (SARS-CoV). The outbreak occurred in 2002-2003. Options A and B have 'accured' which is a misspelling of 'acute'.

Varicella is the medical term for chickenpox, a highly contagious viral infection caused by the varicella-zoster virus. It causes an itchy rash and red spots or blisters all over the body, primarily affecting children.

Typhoid is the odd one out because it is the only bacterial disease in the list. AIDS (caused by HIV), Influenza (caused by influenza virus), Pneumonia (most commonly viral), and Rabies (caused by rabies virus) are all viral diseases. Typhoid is caused by Salmonella typhi bacteria.

Varicella is the medical term for chickenpox, a highly contagious viral infection caused by the varicella-zoster virus. It causes an itchy rash and red spots or blisters all over the body. Rabies is a viral brain infection, tuberculosis is a bacterial lung infection, and piles (hemorrhoids) are swollen veins in the rectum.

Influenza (flu) is caused by influenza viruses, specifically type A, B, or C influenza viruses. It is NOT caused by bacteria (which cause strep throat or bacterial pneumonia). 'Catching a chill' and 'being run down' are myths or risk factors that may weaken immune response, but they are not the actual causative agent.

Septicemia is a bloodstream infection (sepsis) and not a disease of the lungs. Tuberculosis, Silicosis, and Pleurisy are all lung-related conditions. TB is bacterial, Silicosis is from dust inhalation, and Pleurisy involves inflammation of lung lining.

The correct spelling is "Tuberculosis" - 'tu' + 'ber' + 'cu' + 'lo' + 'sis'. The 'r' comes after 'be', not before. Incorrect forms include "Tubarculosis" (wrong 'r' placement), "Tuberculoses" (plural 'es' instead of 'is'), and "Tuberculasis" (missing 'lo').