Question

Choose the correct series of bacteria that cause Tetanus, Diphtheria, Crown gall and Blight, respectively

• A. Clostridium, Corynebacterium, Agrobacterium, Xanthomonas
• B. Vibrio, Diplococcus, Xanthomonas, Clostridium
• C. Xanthomonas, Agrobacterium, Corynebacterium, Clostridium
• D. Corynebacterium, Agrobacterium, Xanthomonas, Clostridium

Hint:

Remember the disease-bacteria pairs for plant and human pathogens—link by their common names and hosts.

Answer 1

The Correct Option is A

• Tetanus: Caused by Clostridium tetani, a Gram-positive, anaerobic, spore-forming bacterium. It produces tetanospasmin, a potent neurotoxin that causes muscle rigidity and spasms.
• Diphtheria: Caused by Corynebacterium diphtheriae, a Gram-positive bacterium. It produces diphtheria toxin that damages tissues, primarily affecting the respiratory tract.
• Crown gall: Caused by Agrobacterium tumefaciens, a Gram-negative soil bacterium. It infects plants causing tumor-like growths (galls) at the crown region by transferring part of its DNA (T-DNA) into the host plant cells.
• Blight: Caused by Xanthomonas, a genus of Gram-negative bacteria. They are plant pathogens causing leaf spots, blights, and other plant diseases affecting many crops.