Disease Causative Agents

Typhoid and cholera are both caused by bacteria that spread through contaminated water and food. Typhoid is caused by Salmonella Typhi, while cholera is caused by Vibrio cholerae. These are classic examples of water-borne diseases, not airborne infections. Infectious diseases is too broad a category.

H1N1 is the influenza virus strain that caused the 2009 swine flu pandemic. It's a subtype of Influenza A virus that contains genes from swine, avian, and human influenza viruses. The other options are incorrect: dsDNA describes a double-stranded DNA structure (not a virus), while ssH1 and H1S1 are not valid virus designations.

Swine flu is primarily caused by the H1N1 strain of the Influenza A virus. The name refers to its origin in pigs. Other options like dsDNA describe a type of viral genome, while H1S1 and ssH1 are not recognized designations for this virus.

Swine flu is caused by the H1N1 influenza virus (Influenza A virus subtype H1N1). This specific strain was responsible for the 2009 swine flu pandemic. H1N1 is the correct and internationally recognized designation for this virus.

Cholera, Typhoid, and Hepatitis are systemic infectious diseases primarily transmitted through contaminated food and water (fecal-oral route), affecting the digestive system or causing systemic illness. Bronchitis is a respiratory condition affecting the bronchial tubes and lungs, making it the odd one out based on the organ system affected and transmission route.

STD stands for Subscriber Trunk Dialing, a telephone system allowing subscribers to make long-distance calls directly without operator assistance. This was commonly used before mobile phones became widespread.

Consumption was the common historical name for tuberculosis because the disease seemed to consume people from within, causing severe weight loss. The term was widely used until the mid-20th century.

Barynya (Russian folk dance), Clogging (American folk dance with tap shoes), Farruca (Spanish flamenco style), and Gigue (French/Baroque dance) are all traditional dance forms from different cultures. They are not diseases, trees, or sea ports.

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.

Type 2 wild poliovirus (P2) was declared eradicated in 1999, making it the first of the three wild polio strains to be eliminated globally. The last naturally occurring case of P2 was detected in 1999 in India. Type 1 and Type 3 wild polioviruses continued to circulate after this date.

Typhoid (caused by Salmonella typhi) and cholera (caused by Vibrio cholerae) are classic water-borne diseases. They spread through contaminated water or food washed with contaminated water, not through air or direct contact.

Pyorrhea, also known as periodontitis, is an inflammatory disease affecting the tissues surrounding the teeth, primarily the gums. It causes gum infection, inflammation, and can lead to tooth loss if untreated. The other options (nose, heart, lungs) are unrelated to this condition.