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Wednesday, 23 January 2013, 14:05 HKT/SGT
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Source: Pertanika Journal
Emerging Antibiotic Resistance in Listeria

Selangor, Malaysia, Jan 23, 2013 - (ACN Newswire) - A recent publication by W.C. Wong and colleagues in the Pertanika Journal of Tropical Agricultural Science revealed the presence of multidrug-resistant strains of Listeria monocytogenes in frozen burger patties taken from supermarkets and other retail shops in Malaysia.

The results also suggested that the overall incidence of antibiotic resistance in L. monocytogenes is relatively low, and that most of the bacterial strains isolated from food are susceptible to antibiotics commonly used in veterinary and human therapy.

Often found in raw foods, L. monocytogenes can cause listeriosis when ingested. Symptoms may range from gastrointestinal upset to headaches, fever and, in severe cases, brain infection and/or blood poisoning. Those at highest risk include pregnant women, newborns and the elderly, as well as people with weakened immune systems.

Early diagnosis of listeriosis increases the likelihood of applying appropriate antibiotic treatment before serious consequences occur. The most commonly used antibiotics for treating Listeria infections are ampicillin, penicillin, trimethoprim, tetracycline, erythromycin and gentamicin.

In this study, researchers examined the susceptibility of L. monocytogenes isolated from raw beef, chicken and vegetarian patties to 11 different antibiotics. Thirteen out of 41 bacteria samples or isolates were not resistant to any of the antibiotics, while 28 were resistant to at least one. Moreover, 19 out of 41 isolates showed resistance to at least two antibiotics. The most common form of antibiotic resistance was tetracycline resistance, followed by erythromycin resistance. However, none of the 41 isolates were resistant to imipenem or gentamicin.

Antibiotic-resistant L. monocytogenes strains were first reported in 1988. The spread of antibiotic-resistant bacteria is accelerating worldwide, partly due to the over-prescription of drugs in clinical settings and the heavy use of antibiotics as growth promoters in livestock husbandry.

The authors recommend the continuous monitoring of antimicrobial resistance in L. monoctyogenes to assure the ongoing effectiveness of listeriosis treatment.

References:
1. Antibiogram Pattern among Cultures of Listeria monocytogenes isolated from Frozen Burger Patties in Malaysia, Wong et al. JTAS Vol. 35 (4) Nov. 2012 (Article ID: JTAS-0338-2010)
2. http://www.hc-sc.gc.ca/hl-vs/iyh-vsv/food-aliment/listeria-eng.php

The paper is available from this link: http://bit.ly/WeUGaO


About Pertanika Journal of Tropical Agricultural Science (JTAS)

Pertanika Journal of Tropical Agricultural Science (JTAS) is published by Universiti Putra Malaysia in English and is open to authors around the world regardless of nationality. Beginning 2012, it would be published four times a year in February, May, August and November. Other Pertanika series include Pertanika Journal of Science & Technology (JST), and Pertanika Journal of Social Sciences & Humanities (JSSH).

JTAS aims to provide a forum for high quality research related to tropical agricultural research. Areas relevant to the scope of the journal include: agricultural biotechnology, biochemistry, biology, ecology, fisheries, forestry, food sciences, entomology, genetics, microbiology, pathology and management, physiology, plant and animal sciences, production of plants and animals of economic importance, and veterinary medicine. The journal publishes original academic articles dealing with research on issues of worldwide relevance.

Website: http://www.pertanika.upm.edu.my/

For more information about each research, please contact:

Wong, W. C.
Centre of Excellence for Food Safety Research
Department of Food Science
Faculty of Food Science and Technology
Universiti Putra Malaysia
43400 Serdang, Selangor, Malaysia
Email: woanchwen85@hotmail.com
Tel: +603 8946 8361; Mobile: +6019 202 1382

For more information about the journal, contact:

The Chief Executive Editor (UPM Journals)
Head, Journal Division, UPM Press
Office of the Deputy Vice Chancellor (R&I)
IDEA Tower 2, UPM-MDTC Technology Centre
Universiti Putra Malaysia
43400 Serdang, Selangor
Malaysia.
Phone: +603 8947 1622 | +6016 217 4050
Email: nayan@upm.my

Press release distributed by ResearchSEA for Pertanika Journal.


Jan 23, 2013 14:05 HKT/SGT
Topic: Research and development
Sectors: Science & Research
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