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In the present study aqueous, ethanol and methanol extracts of freshwater mussel Parreysia corrugata were screened for antibacterial activity. The extracts were obtained from the whole body tissue of the animals and tested against 5 pathogenic bacteria viz., Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Enterococcus faecalis and Staphylococcus aureus. Ethanol extract of P.corrugata showed maximum antibacterial activity 11 mm against P.aeruginosa and the minimum activity 9 mm against K. pneumoniae. Methanol extract of P.corrugata showed Maximum inhibition 13mm against P.aeruginosa and the minimum inhibition zone of 8mm against K. pneumoniae. Aqueous extract of P.corrugata showed the maximum inhibition zone was 10mm against S.aureus and the minimum inhibition zone was 7 mm against S.typhi. Aqueous, Ethanol and Methanol extracts showed antibacterial activity against five human pathogen bacteria tested. Compare to water extracts Ethanol and Methanol extracts showed more activity against all pathogens. FTIR analysis revealed the presence of bioactive compounds signals at different ranges. [ABSTRACT FROM AUTHOR]

Molluscs are highly delicious seafood and they are also very good source for biomedically imported products. Gastropod crude extract was tested for inhibition of bacterial growth against human pathogenic bacteria. Pila virens was screened against five human pathogenic bacteria strains for antibacterial activities. Five species of pathogenic bacteria namely Klepsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Staphylococcus aureus , Enterococcus faecalis. Control discs were with water and solvents to assess the effect of water and solvents on pathogens. The plates were incubated at 37 °C for 24 h the antimicrobial activity was measured accordingly based on the inhibition zone around the disc impregnated with gastropod extract. Ethanol extract of Pila virens was found active against five species of pathogens. The inhibition zone ranged from 9 mm to 11 mm. The maximum inhibition zone was 11 mm against Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis. The minimum zone was 9mm in Salmonella typhi and 10mm in Klepsiella pneumoniae. Water extract of Pila virens zone ranged from 9mm to 10mm. The maximum inhibition zone was 10mm in Staphylococcus aureus, Enterococcus faecalis and the minimum inhibition zone was 9mm in Klepsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi. Commercial antibiotics are highly effective to kill the bacterial and fungal pathogens involved in common infection. Water, ethanol extracts of gastropods used in the present study showed significant antibacterial activity compare with other solvents extraction. FTIR analysis revealed the presence of bioactive compounds signals at different ranges. It is worthy to note that the product from natural source is good for health and to avoid side effects. [ABSTRACT FROM AUTHOR]