Answer: Chennai
Notes: The Giant African Snail (Lissachatina fulica), one of the world’s worst invasive species, has infested Chennai city and its outskirts. Experts warn the snail spreads rapidly during floods, posing risks to city residents. It is not only an agricultural pest but also a carrier of dangerous parasites. The snail transmits parasitic nematodes Angiostrongylus cantonensis and A. costaricensis. These cause eosinophilic meningoencephalitis (brain infection) and abdominal angiostrongyliasis in humans. Infections spread through ingestion of contaminated snails or their residues. Researchers highlighted that Chennai faces a major public health threat due to this invasive species.
