Bacteria causing gastro intestinal tract infections / B. Vinoth, Raja M. Krishna, and B. Agieshkumar -- Gateways of pathogenic bacterial entry into host cells Salmonella / Balakrishnan Senthilkumar, Duraisamy Senbagam, Chidambaram Prahalathan, and Kumarasamy Anbarasu -- Bacteria causing respiratory tract infections / Boopathi Balasubramaniam, Udayakumar Prithika, and Krishnaswamy Balamurugan -- Oral health : a delicate balance between colonization and infection / Ana Moura Teles and Jose Manuel Cabeda -- Bacterial infections in atherosclerosis : atherosclerosis microbiome / Emil Kozarov and Ann Progulske-Fox -- Neonatal bacterial infection / Koilmani Emmanuvel Rajan and Karen Golda Evangeline -- Bacteria causing orthodontal infections / P.S. Manoharan and Praveen Rajesh -- Bacteria causing orthodontal infections / Charles Solomon, Akino Mercy, and Kalimuthusamy Natarajaseenivasan -- Beneficial lactic acid bacteria / Galina Novik and Victoria Savich -- Bacteria causing in dermatological infections / Thirukannamangai Krishnan Swetha and Shunmugiah Karutha Pandian -- Bacteria causing ophthalmic infections / Arumugam Priya and Shunmugiah Karutha Pandian -- Role of bacteria in urinary tract infections / JebaMercy Gnanasekaran, Kannan Balaji, and Krishnaswarmy Balamurugan -- Role of bacteria in blood infections / Kannan Balaji, Gnanasekaran JebaMercy, and Krishnaswamy Balamurugan.