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Articles by M. Nadirah
Total Records ( 7 ) for M. Nadirah
  A.A. Laith , M. Najiah , S.M. Zain , S.H.M. Effendy A.W. , T. Sifzizul T.M. , M. Nadirah and M. Habsah
  The objective of this study was to conduct in vitro study of antimicrobial properties of mangrove plants Sonneratia caseolaris and Rhizophora apiculata against fish pathogenic bacteria. Leaves of mangrove plant were collected from area nearby University Malaysia Terengganu. Methanol extracts of mangrove plants were obtained by using Soxhlet extractor. The bacterial cultures used were Klebsiella pneumoniae, Shigella dysenteriae, Enterobacter cloacae, Enterobacter sakazakii, Enterobacter brevis, Chryseobacterium indologenes, Stenotrophomonas maltophilia and Aeromonas hydrophila isolated from fish. The antimicrobial susceptibility test showed that the bacteria were 87.5% resistant towards colistin sulphate and 62.5% sensitive to fosfomycin. The Minimum Inhibitory Concentration (MIC) of Sonneratia caseolaris and Rhizophora apiculata ranges from 1.56-6.25 and 12.5-25 mg mL-1, respectively. The lowest Minimum Bactericidal Concentration (MBC) value was 12.5 mg mL-1 of Sonneratia caseolaris and 25 mg mL-1 of Rhizophora apiculata. The highest activity with LC50 of Sonneratia caseolaris was 6.16 mg mL-1 and Rhizophora apiculata was 0.76 mg mL-1, respectively. Methanol extracts of Sonneratia caseolaris was effective on all gram negative bacteria (Klebsiella pneumoniae, Shigella dysenteriae, Enterobacter cloacae, Enterobacter sakazakii, Enterobacter brevis, Chryseobacterium indologenes, Stenotrophomonas maltophilia and Aeromonas hydrophila) when compared to Rhizophora apiculata.
  A.I. Zamani , M. Nadirah , M.A. Amiza and M. Najiah
  Recognition proteins play an important role in the immunodefense system of invertebrates. The haemolymph of the Slipper oyster, Crassostrea iredalei, contains a heparin-binding protein with a molecular weight of 35 kDa as determined by SDS-PAGE analysis. The protein was purified using column chromatography. This binding protein possesses a serine protease activity thus it is capable of activating the prophenoloxidase-activating (proPO) system. However, the protein lacks β-1,3-glucanase activity. Using rabbit antiserum against the isolated protein in immunodiffusion and immunoblotting assays it produced a single precipitant and a single band, respectively. However, N-terminal amino acid sequence of BGBP: Threonine-Alanine-Arginine-Asparagine-Glutamic acid-Alanine-Asparagine-Valine was similar to Cavortin (AAT44352) and extracellular superoxide dismutase (AAY60161) from C. gigas.
  M. Najiah , N.I. Aqilah , K.L. Lee , Z. Khairulbariyyah , S. Mithun , K.C.A. Jalal , F. Shaharom-Harrison and M. Nadirah
  Massive mortality of cage-cultured red hybrid tilapia Oreochromis niloticus in Como River, Kenyir Lake, Malaysia was investigated. Moribund fish showing erratic swimming, sluggishness and hemorrhagic eyes were collected for the study. Water quality parameters were measured on-site. The highest temperature was 32.70°C at the surface while lower temperature was 30.85°C at 6 m. Dissolved Oxygen (DO) was highest 7.05 mg L-1 at 4 m while lowest 6.15 mg L-1 at 10 m. The pH value was highest 8.28 at 6 m and lowest 7.52 at surface. The result has shown that un-ionized ammonia levels ranged from 0.00046-0.01 ppm within the optimum range. While Nitrite (0.003 ppm) and Nitrate values (0.1-0.7 ppm). The water quality parameters were showed their values within the accepted range of water quality for aquaculture. Bacteria were isolated from diseased fish using blood and nutrient agars, and identified using BBL Crystal™ Enteric/Non-fermenter ID and Gram Positive ID Systems and subjected to antibiotic susceptibility analysis. Results showed the presence of Streptococcus agalactiae, Burkholderia cepacia in the fish liver and Staphylococcus aureus in the fish eyes, suggesting a possible case of warm-water streptococcosis associated with S. agalactiae with multiple bacterial complications. Nevertheless, a continuous long term monitoring is essential for the sustainable development of cage aquaculture in Como river of Lake Kenyir Malaysia.
  M. Najiah , M. Nadirah , I. Sakri and F. Shaharom-Harrison
  A study was carried out to investigate the presence of bacteria flora in wild mud crab (Scylla serrata) from Setiu Wetland as well as their antibiotic resistances. A total of 91 bacterial isolates consisting of 12 bacterial species were successfully isolated from mud crab. Oxolinic acid was found to be effective against all the bacterial isolates whilst the highest percentage of antibiotic resistance was shown by lincomycin (94.5%) followed by ampicillin (90.1%), amoxicillin (86.8%) and oleandomycin (78.0%). The study is very useful to evaluate the safety of mud crab for human consumption based on wild mudcrab-associated bacteria as well as their antibiotic resistances.
  M. Nadirah , H.H. Ruhil , K.C.A. Jalal and M. Najiah
  A total of 182 isolates of Plesiomonas shigelloides were identified from 40 healthy red hybrid tilapia, Oreochromis niloticus cultured at two important rivers in Terengganu, Malaysia namely Como River and Terengganu River from east coast Malaysia. P. shigelloides count in Digestive Tract Content (DTC) and Muscle (MUS) of red hybrid tilapia cultured at Terengganu River was 1000-fold higher than Como River. Antibiotic susceptibility test was also performed on Plesiomonas shigelloides isolates. The incidence of antibiotic resistance was higher in Plesiomonas shigelloides isolated from red hybrid tilapia cultured at Terengganu River compared to Como river. Thus, the findings of the study indicate that P. shigelloides from tilapia muscle and an intestine could be an alarming for serious public health risk to consumers.
  A. Amin-Safwan , H. Muhd-Farouk , M. Nadirah and M. Ikhwanuddin
  Background and Objective: Mud crab from the genus Scylla are considered as one of the most demanded seafood items nowadays as their flesh has high quality, tasty and higher growth rate thus support and boosted expansion in aquaculture sector especially in Malaysia. Present study was designed to focus on the effect of water salinity on the ovarian maturation of orange mud crab, Scylla olivacea based on morphological characteristics. Methodology: Samples were collected from Setiu wetlands, Terengganu, Malaysia from July-September, 2015. Ovarian maturation of S. olivacea was classified into four stages based on previous study which were: Immature (Stage 1), early mature (Stage 2), late mature (Stage 3) and fully mature (Stage 4). Results: Morphologically as the ovary develop the colouration start to change from translucent or whitish in colour and sometimes creamy to pale yellow, follow by light orange and lastly reddish orange. Stage 1 ovary was translucent and whitish in colour, stage 2 ovary was pale yellow in colour, stage 3 was light orange and stage 4 ovary was reddish orange in colour. Gonad Somatic Index (GSI) of S. olivacea remained low at stage 1 and 2 and began to increase started at stage 3. This present study involved three different salinities treatments, which treatment 1 (10 ppt), treatment 2 (20 ppt) and treatment 3 (30 ppt). Treatment 2 produce the highest number of stage 4 ovarian maturation based on colouration and the highest GSI recorded, follow by treatment 1 and lastly treatment 3. Conclusion: This present study proved that salinity does affected the ovarian maturation of S. olivacea in captivity and provides important information regarding the effect of water salinity on ovarian maturation for further studies on reproductive biology of this species.
  M. Najiah , M. Nadirah , Z. Arief , S. Zahrol , L.W. Tee , A.D. Ranzi , A.S. Amar , A.R. Laith , M. Mariam , S. Suzana and R.J. Aida
  The study was conducted to investigate the antibacterial properties of five edible herbs against fish pathogenic bacteria. Herbs extracts including black pepper (Piper nigrum), clove (Syzygium aromaticum), curry leaf (Murraya koenigii), onion (Allium cepa) and Vietnamese coriander (Persicaria odorata) were screened against nine common fish pathogens namely Escherichia coli, Edwardsiella tarda, Aeromonas hydrophila, Citrobacter freundii, Vibrio parahaemolyticus, Vibrio vulnificus, Staphylococcus aureus, Streptococcus agalactiae and Streptococcus anginosus. Methanol extracts of S. aromaticum showed antibacterial properties against V. parahaemolyticus, V. vulnificus, S. aureus and S. anginosus with Minimum Inhibitory Concentration (MIC) values of 1.56, 3.13, 3.13 and 0.78 mg mL-1, respectively. Water extract of S. aromaticum exhibited activity against A. hydrophila and S. aureus with MIC values of 12.5 and 50.0 mg mL-1, respectively. Methanol extract of M. koenigii was active against S. agalactiae and its MIC was 0.39 mg mL-1 while methanol extract of P. odorata was active against S. aureus and its MIC was 3.13 mg mL-1. For the heat stability test, methanol extract of S. aromaticum showed activity at temperatures of 37, 47, 57, 97 and 105°C with 7 to 8 mm in diameter of inhibition zone while another herbs were only active at 37°C. In general, methanol extract of S. aromaticum showed the greatest antibacterial activity among all herbs extracts tested.
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