Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Anti-diarrhoeal, Antimicrobial and Cytotoxic Effect of Ethanol Extracted Guava (psidium Guajava) Leaves

Mohammad Mahmudul Hassan*
Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4202, Bangladesh

A B M Shahinuzzaman
Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4202, Bangladesh

Shahneaz Ali Khan
Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4202, Bangladesh

M B Uddin
Department of Medicine and Surgery, Sylhet Agricultural University, Sylhet-3100, Bangladesh

Mohammad Mahabub-Uz-Zaman
Scientific Officer, Drug and Toxins Research Division, BCSIR Laboratory, Chittagong-4220, Bangladesh

Abstract/ Executive Summary:

Guava leaf (Psidium guajava) is commonly used to treat bacterial infection, gastroenteritis and diarrhoea. Present study was aimed at determining the anti-diarrhoeal, antimicrobial and cytotoxic effect of the ethanol extracted guava plant leaves. The ethanol extracted guava (P. guajava) plant leaves showed significant (P<0.05) anti-diarrhoeal activity on castor oil induced diarrhoea in model albino rat comparing with loperamide (P<0.01). The leave extract tested against ten pathogenic bacteria and exhibits prominent antibacterial activity against five gram positive (Stayphylococcus aureus, Bacillus polymyxa, Bacillus cereus, Bacillus megnatum and Bacillus subtilis) bacteria and one gram negative (10.5mm). bacteria with highest zone of inhibition(13.25mm) for Proteus sp followed by Stayphylococcus aureus (10.5mm). LC₅₀ of ethanol extract of guava leaves against brine shrimp nauplii was 828.7μg/ml and the wide range of LC₅₀ value denoted the safety effect of the extract.

Keywords: Anti-diarrhoeal, Antimicrobial, Cytotoxicity, Ethanol extracted guava leaf, Albino rat.

Location: Department of Physiology, Biochemistry and Pharmacology, Chittagong Veterinary and Animal Sciences University, Khulshi, Chittagong-4202, Bangladesh

Start Date:

End Date:

Program Area: Resource Development and Management

Commodity: Guava

Objectives:

Present study was taken up to evaluate antimicrobial, anti-diarrhoeal and cytotoxic effect of ethanol extract guava leaves.

Methodology:

Preparation of plant extracts
Sample collection
Fresh Guava (Psidium guajava) leaves collected from the Bangladesh Agricultural Research Institute, Chittagong (BARI) were chopped into small pieces air dried for 21 days. Dried leaves were ground into fine powder and stored in air tight containers in a cool, dark and dry place until use.
Extraction
3000 ml of ethanol was poured gradually into a clean glass jar containing 500g of dried leave powder. The lid was closed properly to resist the entrance of air into the jar. The jar was kept for 15 days with regular stirring by means of a clean glass rod at 2-3 days of interval.
Filtration
The leaf extract was filtered through sterilized cotton filter rinsed with ethanol. The filtrate was collected in a beaker and filtrated again through whartman filter paper. The filtrate thus obtained was evaporated to dry by vacuum evaporative Rotatory machine (Model 2).
Re-Extraction
Dried material was subjected to re-extraction in 500 ml ethanol. The filtration procedure was repeated and 51.98g leaves extract was obtained and kept and stored at 4ºC.
Animal and diet
Albino rats weighing on average 150-200g were selected from Animal house of Chittagong Veterinary and Animal Sciences University, The animals were acclimatized to standard lab conditions (temperature 24±1ºC , relative humidity 55±5% and 12 hrs photoperiod) for one week before the commencement of the experiment in suspended wire meshed galvanized cages (4-6 rats/cage). During the period of study rats were supplied with a semi- purified basal diet adlib water and maintained according to the NIH guidelines for care and use of Laboratory Animals (Saha et al, 2001)
Anti-diarrhoeal Assay
Test protocol (Castor oil induced diarrhoea)
15 albino rats were allotted to three (control, positive control and test group) groups. 2ml water, 2ml plant extract and 2ml of anti-diarrhoeal (loperamide) per rat were administered orally to control, positive control and test group respectively. After half-an hour 2ml of castor oil per rat was orally administered to each group to induced diarrhoea (Yegnanaryan and Shostri, 1982). Faecal material was checked for consistency every hour. was defined as the Presence of fluid material in the stool that stained the absorbent paper placed beneath the cage indicated induction of diarrhoea. The number of respondents and stool passed during 6 hrs period was recorded for each rat to determine the effect of plant extract against diarrhoea.
Disc Diffusion Method for Preliminary Assay of Antimicrobial Effect (Bauer et al, 1966).
Pure cultures of 10 bacterial organisms ( Staphylococcus aureus BTCC:43 , Shigella sommei ICDDR?B , Klebsilla sp ICDDR?B , Bacillus polymyxa BTCC:16 , Bacillus cereus BTCC:19 , Bacillus megatenusm BTCC:18 , Bacillus subtilis BTCC:17 , Salmonella typhi ICDDR?B , Proteus sp ICDDR?B , Shigella flexinary ICDDR?B.) were collected from the microbiology section of BCSIR laboratory. One loop of pure culture of each organisms was inoculated into individual test tube containing nutrient broth and incubate at 37ºC for 24hrs to develop sub culture of each of the ten organisms .These cultures were streaked individually on ten nutrient agar plates and incubated at 37ºC for 24hrs to promote bacterial multiplication throughout the petridish.
A solution of 100μg/ml concentration of guava leave extract was prepared by dissolving the extract in alcoholic solvent. Sterilized and dried filter paper discs (4mm in diameter) were impregnated with leave extract solution using micropipette.. Three discs, one each of leave extract, tetracycline(30μg/ml). and solvent soaked were placed on each agar plate seeded with specific bacterial culture . All plates were incubated at 37ºC for 24hrs to allow the maximum growth of the organisms. The antimicrobial effect of guava leave extract was determined by comparing the diameter of “Zone of Inhibition?. of leave extract disc with that of tetracycline disc.
Cytotoxicity Assay
The cytotoxicity assay was performed on brine shrimp nauplii using Brine-Shrimp Lethality Assay (Meyer et at., 1982). Brine shrimp nauplii were obtained by hatching brine shrimp eggs (Carolina Biology Supply Company, Burlington, NC, USA) in artificial sea water (22.5g sodium chloride dissolved in 500ml water) for 48hrs. Dissolution of guava leave extract was performed in artificial sea water. 5ml solution of different concentrations (62.5, 125, 250, 500, 1000, 2000 μg/ml) of the leave extract were taken in seperate beakers containing brine shrimp nauplii and observed for mortality for 24hrs. Artificial sea water medium containing DMSO was taken as control. The data were transformed to probit analysis for the determination of LC50 values of the extract.
Statistical Analysis
Data were expressed as Mean ± S.E. (Standard Error). Unpaired “t” tests were applied for significant tests. SPSS for WINDOWS@TM Statistical Package for social science for Windows was applied for analysis of data. Probability (P) value of 0.05 or less (P≤0.05) was considered as significant. In case of cytotoxicity, the LC50 values were calculated by “Probit Analysis”.using “Bio-State Software-2007”

Source of Information: Online Veterinary Journal 2011, Vol. 6 No. 2, Article 91

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Ethanol extract of guava leaf has efficient level of anti-diarrhoeal and antimicrobial effect. As its LC₅₀ value is wider which indicates its safety margin and indicates that its toxicity level in minimum.

Knowledge Management: Journal