6 [31] SAS. 9.1 ed. Cary, NC, USA: SAS Institute Inc.; 2006. [32] E. D. Gorski, “Management of giardiasis,” American Family Physician, vol. 32, no. 5, pp. 157–164, 1985. [33] D. B. Huang and A. C. White, “An updated review on Cryp- tosporidium and Giardia,” Gastroenterology Clinics of North America, vol. 35, no. 2, pp. 291–314, 2006. [34] W. A. Petri Jr., “Treatment of giardiasis,” Current Treatment Options in Gastroenterology, vol. 8, no. 1, pp. 13–17, 2005. [35] Thomson Micromedex, “2004 U.S. FDA Drug Approval,” 2004, [cited October 2006], http://www.micromedex.com/ pressroom/news feeds/fdaapprovals/fda tinidazole.html. [36] J. C. Harris, S. Plummer, and D. Lloyd, “Antigiardial drugs,” Applied Microbiology and Biotechnology, vol. 57, no. 5-6, pp. 614–619, 2001. [37] R. Cedillo-Rivera, B. Cha´vez, A. Gonza´lez-Robles, A. Tapia, and L. Ye´pez-Mulia, “In vitro eﬀect of nitazoxanide against Entamoeba histolytica, Giardia intestinalis and Trichomonas vaginalis trophozoites,” Journal of Eukaryotic Microbiology, vol. 49, no. 3, pp. 201–208, 2002. [38] L. di Martino, A. Nocerino, and M. P. Mantovani, “Meben- dazole in giardial infections: conﬁrmation of the failure of this treatment,” Transactions of the Royal Society of Tropical Medicine and Hygiene, vol. 85, no. 4, pp. 557–558, 1991. [39] J. Gascon, R. Abos, M. E. Valls, and M. Corachan, “Meben- dazole and metronidazole in giardial infections,” Transactions of the Royal Society of Tropical Medicine and Hygiene, vol. 84, no. 5, p. 694, 1990. [40] J. Gascon, A. Moreno, M. E. Valls, J. M. Miro, and M. Corachan, “Failure of mebendazole treatment in Giardia lam- blia infection,” Transactions of the Royal Society of Tropical Medicine and Hygiene, vol. 83, no. 5, p. 647, 1989. [41] S. M. Sadjjadi, A. W. Alborzi, and H. Mostovﬁ, “Comparative clinical trial of mebendazole and metronidazole in giardiasis of children,” Journal of Tropical Pediatrics, vol. 47, no. 3, pp. 176–178, 2001. [42] Organization of Teratology Information Specialists, “Flagyl (metonidazole) and Pregnancy,” 2006, [cited October 2006], http://www.otispregnancy.org/pdf/Flagyl.pdf. [43] A. E. Czeizel, Z. Kazy, and P. Vargha, “Oral tinidazole treat- ment during pregnancy and teratogenesis,” International Jour- nal of Gynecology and Obstetrics, vol. 83, no. 3, pp. 305–306, 2003. [44] R. W. Steketee, S. Reid, T. Cheng, J. S. Stoebig, R. G. Harring- ton, and J. P. Davis, “Recurrent outbreaks of giardiasis in a child day care center, Wisconsin,” American Journal of Public Health, vol. 79, no. 4, pp. 485–490, 1989. Infectious Diseases in Obstetrics and Gynecology