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Molecular identification of Rusa timorensis (javan rusa) and Rusa unicolor (sambar deer) based on mitochondrial cytochrome c oxidase subunit I (COI)
2021
Fatin Nabilah A. | Nurain Izzati S.
Locally, venison is considered as a premium and exotic meat, as it is not commonly found in fresh food markets and grocery stores. Despite its limited availability, demand is always high in its niche market, especially during festive seasons which highly escalate the price. However, as an expensive delicacy, deer meat is highly susceptible to fraudulent substitution and adulteration. Authentic deer meat are currently only recognized by consumers based on their own experience, meat texture, and taste which can be quite subjective. To assist in authenticating local deer meat in the market and protect consumers from fraudsters, Polymerase Chain Reaction (PCR) analysis can be carried out to distinguish between venison and other animal meat and products. Farmed venison in Malaysia are mostly from the species Rusa timorensis while Rusa unicolor is bred in the wild. Here, we detailed a newly developed conventional PCR method that is able to detect R. timorensis and R. unicolor based on partial mitochondrial cytochrome c oxidase subunit I (COI) in a single run, thus providing a simple and more accurate alternative in venison authentication.
Afficher plus [+] Moins [-]Antibiotic susceptibility of bacteria isolated from the genital system of cows in Al-Hilla, Iraq
2015
Sulake Fadhil Al-Zubaidi
The aim of this study was to investigate the bacteria found in different parts of the genital system in cows and the susceptibility to different types of antibiotics. The genital systems of sixteen cows were collected from Al-Hilla, Iraq slaughterhouse. Isolation and identification of bacteria were made for each part of the genital system and antibiotic susceptibility tests was conducted to the isolated bacteria. The results of this study indicated that there were several types of bacteria present in the genital systems of cows. Different species of bacteria were isolated from the samples including, Escherichia coli (28.97)%, Klebsiella spp. (16.82)%, Salmonella spp. (14.95)%, Proteus spp. (13.08)%, Staphylococcus aureus (11.21)%, Staphylococcus epidermidis (8.41)% and Streptococcus spp. (6.54)%. In vitro susceptibility towards different types of antibiotic indicated high susceptibility of Escherichia coli to antibiotic group impenem and ciprofloxacin, while Klebsiella spp. was found to be most susceptible to ciprofloxacin and amikacin. Both Escherichia coli and Klebsiella spp. showed resistance to piperacillin and tetracycline. It was concluded that Escherichia coli was the most predominant bacteria in genital system of cows and were most susceptible to antibiotic impenem and ciprofloxacin.
Afficher plus [+] Moins [-]Sheep Oestrosis (Oestrus Ovis, Diptera: Oestridae) in Damara crossbred sheep
2011
Wan S. | Kamaliah G. | Rugayah M. | Osman M. A. | Gunalan S. | Nabijah D. | Rozita A. R. | Shah A.
Oestrosis is a worldwide myiasis infection caused by the larvae of
the fly Oestrus ovis (Diptera, Oestridae), that develops from the first to the third stage larvae. This is an obligate parasite of the nasal and sinus cavities of sheep and goats. The Oestrus ovis larvae elicit clinical signs of cavitary myiasis seen as a seromucous or purulent nasal discharge, frequent sneezing, incoordination and
dyspnea. Myiasis in an incidental host may have biological significance towards medical and public health importance if
the incidental host is man. This infection can result in signs of generalized disease, causing serious economic losses in sheep and goat reared for meat and dairy production. Due to the large numbers of small ruminants imported into Malaysia from countries which are endemic with oestrosis, precautionary measures should be exercised to prevent this infection from establishing here. In 2009, there was a report of respiratory distress (pneumonic sign) accompanied by high mortality in Damara sheep that was imported from Australia. Investigations showed the presence of Oestrus ovis larvae in affected
sheep. The post mortem was conducted in the field and the larvae were discovered in the tracheal region. The larvae was confirmed as Oestrus ovis using the appropriate keys for identification by Zumpt. The carcass showed pulmonary edema with severe congestion of the lungs accompanied by frothy exudation in the bronchus. There were also signs of serious atrophy (heart muscle) and mild enteritis
(intestine histopathological examination showed, there was pulmonary congestion and edema, centrilobular hepatic necrosis, renal tubular necrosis and myocardial sarcocystosis. The sheep also showed chronic helminthiasis and Staphylococcus spp. was isolated from organ specimens.Oestus ovis infection is rare in Malaysia, as such this case posed as an unusual case for investigation.
Afficher plus [+] Moins [-]Isolation of Streptococcus equi during strangles surveillance in Peninsular Malaysia
2011
Yosnah Y. | Maswati M. A. | Saifu Nazri. R. | Khoo, l. l. | Roseliza R. | Ramlan M.
Strangles is an extremely contagious bacterial infection specific to
equine species( horses, mules and zebras). A nationwide screening of S. equi was conducted among horses following an isolation of Streptococcus equi subsp. equi (S. equi) from a horse. All horses were monitored for the presence of respiratory signs, nasal discharge and submandibular swelling. This paper reports the isolation of S. equi from horses during a nationwide survey from August 2010 to December 2010. From August 2010 to December 2010 our laboratory received 2,825 nasal swabs, 9 guttural pouch flushes, 1 submandibular swab and 1 submandibular abscess. The samples were subjected to conventional bacterial isolation and identification.
Streptococcus equi-positive samples were also confirmed by detecting the M-gene (SeM) of the bacteria by using PCR. Two nasal swabs from two horses and one submandibular abscess from a horse were positive for S. equi by culture and subsequently by PCR. Surveillance for S. equi should be continued for the control of the strangles. PCR can be carried out in parallel to bacterial culture to increase the
detection rate of carriers and shedders.
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