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Whole genome sequence of Brucella melitensisl local isolate from an infected goat in Malaysia
2016
Mohd Mokhtar Arshad | Ramlan Mohamed | Shuhaila Mat Sharani | Hardy Abu Daud | Omer Khazaal Sallou | Mohd Azam Khan Goriman Khan | Hirzahida Mohd. Padil
Brucellosis in goats is mainly caused by the bacterium Brucellamelitensis, which is one of the most important pathogenic species in the world. In Malaysia, the annual prevalence data of brucellosis was recorded in goats and the control strategy of the disease basedon test and cull of infected animals. This strategy has caused huge economic losses to farmers and government alike. Therefore, whole genome sequencing of B. melitensis local strain is essential forimproving the current vaccine. B. melitensis strain VRI 6530/11 wasobtained from veterinary research institute biobank, Ipoh. The strain was submitted for classical identification procedures and the total genomic DNA was extracted by using DNeasy blood and tissue kit(QIAGEN). The concentration and purity of DNA were determined by using agarose gel electrophoresis and spectrophotometer (DNA/RNA) assay respectively. The genome was sequenced by using IlluminaHiSeq platform with insert size ~200 bp. A total of 1.0 Gb data was generated from the sample. More than 95% of sequencing data was retained in the sample after quality filtering, this indicatethe sequencing reads are of high quality. Final assembly had 33 scaffolds with total size ~3.28 Mb, 44 contigs, GC content is 57.25%, N50 is 293,291. A total of 3,238 protein coding genes, 48 tRNAs and 3rRNAs were predicted and over 87% of the genes were functionally annotated. Genome sequencing of a local B. melitensis strain is the first of its kind in Malaysia and work from this study can contribute towards the development of a new effective vaccine for the control ofthe disease in the country.
Afficher plus [+] Moins [-]Detection of Toxoplasma gondii oocyst in cats using Modified Kato-Katz and Sheather’s sugar methods
2016
Norsharina A. | Norina L. | Hanafi H. | Norhamizah A. H. | Rashidah C. M. | Saipul Bahari A. R
Toxoplasma gondii is a protozoan parasite that causes toxoplasmosis in humans and animals. It belongs to the phylum Apicomplexa, subclass Coccidiasina and family Sarcocystidae. The Felidae family is thedefinitive host for this disease where the parasites undergo a sexual cycle of replication (oocysts). In this study, cat faeces were collected from private clinics around Johore Bahru, Peninsular Malaysia. A total of 61 samples were tested using microscopy to detect for presence of T. gondii oocyst via two methods; namelythe Modified Kato-Katz with Kinyoun staining and Sheather’s sugar floatation methods. The results showed that 40.98% of the faecal samples tested were positive for T. gondii oocysts. These two methodswere successfully used in diagnosing toxoplasmosis in cats in this study. Morphological approaches for Toxoplasma oocysts identification have been neglected in recent years, due to the upsurge of moreprecise technologies. This study suggests that this modified technique could be introduced for screening and detection of oocysts excreted in faeces of suspected animals of the Felidae family.
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