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Articles by Z. Zunita
Total Records ( 7 ) for Z. Zunita
  Soe Soe Wai , A.A. Saleha , Z. Zunita , L. Hassan , A. Jalila and A.H. Shah
  Helicobacter pullorum, an enterohepatic helicobacter with the ability to colonize the intestine and liver of avian species, mice and humans, is increasingly recognized as a food borne zoonotic pathogen. The present study aimed to determine the genetic similarity among H. pullorum using pulsed field gel electrophoresis (PFGE) with SacII and SmaI restriction endonucleases (REs) digestion. The H. pullorum were isolated from broiler chickens in eight farms. Within-farm genetic profiling of isolates showed close relationship (>95%); however genetic diversity was observed between isolates from different farms. Digestion of genome with SacII yielded two clusters comprised 16 pulsotypes, 8-14 DNA bands with a molecular weight ranging from 40 to 400 kb whereas SmaI digested genome produced two clusters with 14 pulsotypes, 7 to 13 DNA bands with molecular weight ranging from 40 to 250 kb. The RE SacII showed a higher discriminatory power compared to SmaI. In conclusion, within-farm genetic similarity of isolates suggested the same source of clonal origin.
  O. Shahaza , S. Khairani-Bejo , Z. Zunita and A.R. Bahaman
  The Rose Bengal Plate Test (RBPT) antigens from Brucella melitensis local isolates (in-house RBPT) were prepared and compared with RBPT antigen for Brucellosis in sheep and goats prepared by Veterinary Laboratory Agency, UK. Eight hundred fifty-six sera samples, of which were collected from goats were examined with the RBPT and Complement Fixation Test (CFT). The RBPT and CFT results showed that the in-house RBPT antigen was superior to the commercial prepared RBPT antigen (VLA, UK). Out of 856 sera analyzed by in-house RBPT, commercial RBPT and CFT, 30.84, 26.40 and 31.65% were found to be Brucella positive, respectively. The sensitivity calculated for the in-house RBPT compared with CFT was 85.24% whilst that of commercial RBPT was 78.59%. Therefore, it was conclude that in-house RBPT antigens could be prepared and used for epidemiological surveillance of Caprine brucellosis in Malaysia.
  A.A. Saleha and Z. Zunita
  A question was posed to the researchers as to whether methicillin resistant Staphylococcus aureus or MRSA, in animals is of public health concern. To answer the question, previous and recent studies were reviewed so as to gain insight into the occurrence of MRSA in animals, namely in food animals and pet animals, in food of animal origin, in personnel working with animals as well in pet owners. The MRSA scenario in Malaysia was also reviewed. The studies reviewed and those carried out in Malaysia showed the widespread occurrence of MRSA in animal species, which include pigs, horses, dogs, cats and chickens and in humans with several studies showed transmissions in both directions. Thus, MRSA is of great concern in both veterinary and human medicine as it can cause serious illnesses in both sets of populations.
  Maged Ahmed AL-Garadi , S. Khairani-Bejo , Z. Zunita and A.R. Omar
  Isolation of Brucella melitensis is the standard gold of identification and confirmation of animal brucellosis. However in Malaysia, Brucella sp., infection of goat was increasing recently and there is no evidence for diagnosis of the serover of Brucella sp., that cause the disease in goat population except the detection of serological methods. Isolation and identification of Brucella melitensis have been done by bacteriological methods in addition to conventional Polymerase Chain Reaction (PCR) and Real-time PCR for detection of Brucella melitensis from samples collected from vaginal swabs on suspected farm. In conclusion, four isolate have been got out of 300 vaginal samples and all isolate is belong to Brucella melitensis server 1. The Real-time PCR is the easy and save method for confirmation of brucellosis in goats population.
  S. Ahmad , M. Hair-Bejo , Z. Zunita and S. Khairani-Bejo
  Salmonella enteritidis (SE) has always been related to subclinical infection in the chickens infected after 2 weeks of hatching. However, few pathogenic phage types were proven for their ability to manifest systemic infection and cause the organism to be shed into the surrounding environment. It was the objective of the study to determine the pathogenicity of SE Phage Type (PT) 1 in Specific-Pathogen-Free (SPF) chickens. About 93, 21 day old SPF chickens where divided into 3 groups namely the Control, SE and Mortality groups. The chickens were raised separately in caging system and given free access to antibiotic-free ration and water. The SE and Mortality groups were inoculated orally (1.0 mL) with SE PT 1 (1x108 cfu mL-1). The chickens in the SE and Control groups were sacrificed at various intervals throughout the trial. Samples were collected for bacterial isolation and histological examination. The mortality percentage of the chickens in the Mortality group was recorded. The study showed that no mortality was recorded throughout the trial in the mortality as well as the SE group. Body weight was lower in the SE group when compared to the Control group throughout the trial except at days 2, 3 and 5 post inoculation (pi) reaching its peak at day 14 pi when the SE group body weight was 26% lower than the controls. Clinical signs observed in the SE and Mortality group were represented by diarrhoea, inappetance, ruffled feather and stunted chickens while no abnormal clinical signs where recorded in the Control group. Grossly mild airsacculitis, mild peritonitis and hepatic congestion where recorded in the SE group at day 2 pi until day 5 pi while no gross lesions where recorded in the Control group. SE was first isolated in the caecum (66%) at 12 h pi. At day 1 pi SE was isolated from the caecum and spleen (33%) whilst at day 2, SE was isolated from the caecum (100%) and caecal tonsil (66%). No SE was isolated from the cloacal swabs throughout the trial. The villi height was generally lower in the SE group when compared to the Controls, however it was significantly lower (p<0.05) in the duodenum at 12 h, days 1, 3, 5, 10, 14 and 21 pi; in the jejunum at 6 h, days 2, 14 and 21 pi while in the ileum at days 1, 3 and 5 pi. The crypts depth measurement was fluctuating however it ended up by being higher in the SE group, nevertheless it was significantly lower (p<0.05) in the SE group when compared to the Control group in the duodenum at 6 h and day 14 pi in the jejunum at day 10 pi; in the ileum at 12 h pi. Histopathological changes recorded included hepatitis, congestion and focal areas of necrosis; splenitis, congestion and oedema in the adenoid sheathed arteries; congestion and areas of necrosis in the lymphoi follicles of the bursa of Fabricius; enteritis, congestion and sloughing of necrotic enterocytes in the intestinal villi with presence of bacterial clusters in the villi surface and intestinal lumen. SE rods present in the caecal tonsils were seen to be engulfed by macrophages at days 1 and 2 pi, necrosis of the enterocytes on the villi surface and infiltration of the bacteria was recorded at day 2 pi while at days 5 pi the bacteria multiplication were seen and often located upon the M-like M cells however, no actual engulfment was recorded.
  Maged Ahmed AL-Garadi , S. Khairani-Bejo , Z. Zunita and A.R. Omar
  PCR assays have been shown to be a promising option for the diagnosis of brucellosis. However, there is no study conducted in Malaysia to identify the brucellosis in goat’s population. In this study three whole blood samples and sera were collected from goat’s farm in Kedah state Malaysia which was suspected to have brucellosis. Serological and molecular detection of brucellosis have been done including RBPT, CFT, conventional PCR and Real time. The evaluation of each test have been discussed rather than the sensitivity and specificity of the each test which can be used in Malaysia national eradication programs. In conclusion, the combination between the serological test and molecular technique specially real time PCR depend on IS711 region in hypothetical protein is promising and can be reduced to false positive result which can cause heavy economical loss during controlling programs.
  S.R. Hashemi , I. Zulkifli , Z. Zunita and M.N. Somchit
  The aim of this study was to compare selected sterilization methods to maintain high susceptibility of antibacterial activities of aqueous extracts of herbal plants. Autoclave-sterilized Impregnated disk and Impregnated disk sterilized by Acrodisc syringe filter were embedded on Mueller-Hinton Agar (MHA) plates seeded with the respective test microorganisms. Among five extracts, Euphorbia hirta exhibited antibacterial activities. Autoclaving caused less damage to the antibacterial activities of the tested extract in comparison with syringe filtration.
 
 
 
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