MRSA is Methicillin Resistant Staphylococcus Aureus. Methicillin used to be nicknamed "gorilla-cillin". Which of the following statements is likely true of MRSA INFECTIONS IN HUMANS? 1. Methicillin is not a good antibiotic to use on this type of infection
2. MRSA is a common infection that is treated by methicillin
3. MRSA originally evolved in gorillas as a zoonotic disease
4. Methicillin is a strong antibiotic and MRSA developed resistance to it, making it harder to treat

4. Methicillin is a strong antibiotic and MRSA developed resistance to it, making it harder to treat.

Explanation:

MRSA was first discovered in 1961. It's now resistant to methicillin, amoxicillin, penicillin, oxacillin, and other common antibiotics known as cephalosporins.

Option 4) Methicillin is a strong antibiotic and MRSA developed resistance to it, making it harder to treat.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.