Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.)‎ on Two Gram-Negative and Gram-Positive Bacteria

Joint Authors

Daniels, Dwayne
Rogers, Kimberly
McLaughlin, Fredrick
Biswas, Bipul
Yadav, Anand

Source

International Journal of Microbiology

Issue

Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-7, 7 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2013-10-20

Country of Publication

Egypt

No. of Pages

7

Main Subjects

Natural & Life Sciences (Multidisciplinary)
Medicine

Abstract EN

Aim.

To determine the antimicrobial potential of guava (Psidium guajava) leaf extracts against two gram-negative bacteria (Escherichia coli and Salmonella enteritidis) and two gram-positive bacteria (Staphylococcus aureus and Bacillus cereus) which are some of foodborne and spoilage bacteria.

The guava leaves were extracted in four different solvents of increasing polarities (hexane, methanol, ethanol, and water).

The efficacy of these extracts was tested against those bacteria through a well-diffusion method employing 50 μL leaf-extract solution per well.

According to the findings of the antibacterial assay, the methanol and ethanol extracts of the guava leaves showed inhibitory activity against gram-positive bacteria, whereas the gram-negative bacteria were resistant to all the solvent extracts.

The methanol extract had an antibacterial activity with mean zones of inhibition of 8.27 and 12.3 mm, and the ethanol extract had a mean zone of inhibition of 6.11 and 11.0 mm against B.

cereus and S.

aureus, respectively.

On the basis of the present finding, guava leaf-extract might be a good candidate in the search for a natural antimicrobial agent.

This study provides scientific understanding to further determine the antimicrobial values and investigate other pharmacological properties.

American Psychological Association (APA)

Biswas, Bipul& Rogers, Kimberly& McLaughlin, Fredrick& Daniels, Dwayne& Yadav, Anand. 2013. Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.) on Two Gram-Negative and Gram-Positive Bacteria. International Journal of Microbiology،Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-495383

Modern Language Association (MLA)

Biswas, Bipul…[et al.]. Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.) on Two Gram-Negative and Gram-Positive Bacteria. International Journal of Microbiology No. 2013 (2013), pp.1-7.
https://search.emarefa.net/detail/BIM-495383

American Medical Association (AMA)

Biswas, Bipul& Rogers, Kimberly& McLaughlin, Fredrick& Daniels, Dwayne& Yadav, Anand. Antimicrobial Activities of Leaf Extracts of Guava (Psidium guajava L.) on Two Gram-Negative and Gram-Positive Bacteria. International Journal of Microbiology. 2013. Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-495383

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-495383