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Antibiotic and gastrointestinal tract flora
Veterinary Microbiology 148 (2011) 452
Contents lists available at ScienceDirect
Veterinary Microbiology journal homepage: www.elsevier.com/locate/vetmic
Letter to the Editor Antibiotic and gastrointestinal tract flora Dear Editor, I read the recent publication by Cornick with a great interest (Cornick, 2009). Cornick conclude that ‘‘some antibiotics may alter the gastrointestinal tract flora in ways that create a less favorable environment for E. coli O157:H7 in swine (Cornick, 2009).’’ This finding is interesting since it is discordant with the finding in cattle (McAllister et al., 2006). Indeed, there are also many other factors that can disturb the pattern of E. coli O157:H7 shedding in animal. In animal, it is noted that economic, logistic and practical impacts of dietary changes must be also examined (Callaway et al., 2009; Jacob et al., 2009). An interesting question on the work published by Cornick is the control of other possible confounding factors. Also, the technique for microbiological test should be mentioned for quality control since this is a basic thing that might lead to false laboratory results.
0378-1135/$ – see front matter ß 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.vetmic.2010.09.001
References Cornick, N.A., 2009. Tylosin and chlorotetracycline decrease the duration of fecal shedding of E. coli O157:H7 by swine. Vet. Microbiol. [November 17; Epub ahead of print]. Callaway, T.R., Carr, M.A., Edrington, T.S., Anderson, R.C., Nisbet, D.J., 2009. Diet Escherichia coli O157:H7, and cattle: a review after 10 years. Curr. Issues Mol. Biol. 11 (2), 67–79. Jacob, M.E., Callaway, T.R., Nagaraja, T.G., 2009. Dietary interactions and interventions affecting Escherichia coli O157 colonization and shedding in cattle. Foodborne Pathog. Dis. 6 (September (7)), 785–792. McAllister, T.A., Bach, S.J., Stanford, K., Callaway, T.R., 2006. Shedding of Escherichia coli O157:H7 by cattle fed diets containing monensin or tylosin. J. Food Prot. 69 (September (9)), 2075–2083.
Viroj Wiwanitkit* Wiwanitkit House, Bangkhae, Bangkok 10160, Thailand *Tel.: +66 24132436 E-mail address: [email protected] 17 January 2010
Contents lists available at ScienceDirect
Veterinary Microbiology journal homepage: www.elsevier.com/locate/vetmic
Letter to the Editor Antibiotic and gastrointestinal tract flora Dear Editor, I read the recent publication by Cornick with a great interest (Cornick, 2009). Cornick conclude that ‘‘some antibiotics may alter the gastrointestinal tract flora in ways that create a less favorable environment for E. coli O157:H7 in swine (Cornick, 2009).’’ This finding is interesting since it is discordant with the finding in cattle (McAllister et al., 2006). Indeed, there are also many other factors that can disturb the pattern of E. coli O157:H7 shedding in animal. In animal, it is noted that economic, logistic and practical impacts of dietary changes must be also examined (Callaway et al., 2009; Jacob et al., 2009). An interesting question on the work published by Cornick is the control of other possible confounding factors. Also, the technique for microbiological test should be mentioned for quality control since this is a basic thing that might lead to false laboratory results.
0378-1135/$ – see front matter ß 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.vetmic.2010.09.001
References Cornick, N.A., 2009. Tylosin and chlorotetracycline decrease the duration of fecal shedding of E. coli O157:H7 by swine. Vet. Microbiol. [November 17; Epub ahead of print]. Callaway, T.R., Carr, M.A., Edrington, T.S., Anderson, R.C., Nisbet, D.J., 2009. Diet Escherichia coli O157:H7, and cattle: a review after 10 years. Curr. Issues Mol. Biol. 11 (2), 67–79. Jacob, M.E., Callaway, T.R., Nagaraja, T.G., 2009. Dietary interactions and interventions affecting Escherichia coli O157 colonization and shedding in cattle. Foodborne Pathog. Dis. 6 (September (7)), 785–792. McAllister, T.A., Bach, S.J., Stanford, K., Callaway, T.R., 2006. Shedding of Escherichia coli O157:H7 by cattle fed diets containing monensin or tylosin. J. Food Prot. 69 (September (9)), 2075–2083.
Viroj Wiwanitkit* Wiwanitkit House, Bangkhae, Bangkok 10160, Thailand *Tel.: +66 24132436 E-mail address: [email protected] 17 January 2010