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International Journal of TROPICAL DISEASE & Health

International Journal of TROPICAL DISEASE & Health, ISSN: 2278-1005,Vol.: 2, Issue.: 3 (July-September)

Short Communication

Effect of Storage Temperature and Sample Volume on Brucella melitensis Isolation from Goat Milk


Jennifer A. Zambriski1*, Ryan C. Maves2, Daryl V. Nydam3, Viterbo Ayvar4, David Cepeda2, Rosa Castillo2, Andre Díaz-Pino4, Mayuko Saito5 and Robert H. Gilman6

1Cornell University, Department of Animal Science, Ithaca, NY 14853, U.S.A.
2Naval Medical Research Unit SIX, Avenida Venezuela Cuadra 36 s/n, Callao 02, Peru.
3Cornell University, Veterinary Medical Center, Room C2 562, Ithaca, NY 14853, U.S.A.
4Centro de Salud Global UPCH, Tumbes, Panamericana Norte Km 1275, Puerto el Cura – Tumbes, Peru.
5AsociaciÏŒn Benéfica PRISMA, Carlos Gonzales 251, Urb. Maranga, San Miguel, Lima, 32, Peru.
6Johns Hopkins University, Bloomberg School of Public Health, 615 N Wolfe St. Rm W5515, Baltimore, MD 21205, U.S.A.




Aim: To determine the impact of storage temperature and sample volume on milk culture success under a simulated field setting.
Study Design: Prospective cohort study.
Place and Duration of Study: Centro de Salud Global UPCH, Tumbes, Peru and Naval Medical Research Unit SIX, Lima, Peru. April, May and June 2010.
Methodology: We aseptically collected milk from unvaccinated goats, and then experimentally inoculated the pooled milk sample with B. melintensis in order to compare the effect of two different sample volumes (2ml and 5ml) and two different storage temperatures (4ºC and -20ºC) on culture success.
Results: We achieved higher culture success in refrigerated (4ºC) versus frozen (-20ºC) samples (OR 4, 95% CI 1.7, 9.6) and with 5-ml versus 2-ml aliquots (OR 9, 95% CI 3.3, 26.6).
Conclusion: In resource-poor field settings where cold-chain and transportation are unreliable, use of ice for sample storage and transport of goat milk is an acceptable method for the purpose of culturing B. melintensis.


Keywords :

Brucellosis; goat; peru; milk; culture; refrigeration; freeze; storage.


Full Article - PDF    Page 207-213    Article Metrics


DOI : 10.9734/IJTDH/2012/1738

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