Leptospiral infection, pathogenesis and Its diagnosis-a review by Samrot, Antony V, Sean, Tan Chuan, Bhavya, Karanam Sai, Sahithya, Chamarthy Sai, Chandrasekaran, SaiPriya, Palanisamy, Raji, Robinson, Emilin Renitta, Subbiah, Suresh Kumar, Mok, Pooi Ling