The correct answer is Bordetella pertussis. Explanation & Key Takeaways: • Whooping cough, also known as pertussis, is caused by the bacterial infection Bordetella pertussis. • It is a highly contagious respiratory disease known for uncontrollable, violent coughing which often makes it hard to breathe. • The disease is preventable by vaccine, but it can be especially severe in infants and young children. • Symptoms of whooping cough usually develop within 5 to 10 days after exposure, but sometimes not for as long as 3 weeks. Related Concepts: • Other bacteria mentioned in the options include: • Staphylococcus aureus: Common cause of skin infections, respiratory disease, and food poisoning. • Streptococcus pyogenes: Known to cause strep throat, skin infections, and rheumatic fever. • Salmonella species: Often associated with food poisoning and gastrointestinal infections.