1. Acha SJ, Kuhn I, Jonsson P, Mbazima G, Katouli M (2004) Studies on calf diarrhea in Mozambique: prevalence of bacterial pathogens. Acta Vet Scand 45:27–36
2. Akam A, Khelef D, Kaidi R, Othmani A, Lafri M, Tali-Maamar H, Rahal K, Tahrat N, Chirila F, Cozma V, Abdul-Hussain MS (2004) Frequency of Cryptosporidium parvum, Escherichia coli K99 and Salmonella spp.isolated from healthy and unhealthy calves in six breeding farms from Mitidja, Algeria (preliminary results). Rev Sci Parasitol 5:13–21
3. Barrington GM, Gay JM, Evermann JF (2002) Biosecurity for neonatal gastrointestinal diseases. The veterinary clinics of North America. Food Anim Pract 18:7–34
4. Crouch CF, Oliver S, Francis MJ (2001) Serological, colostral and milk responses of cows vaccinated with a single dose of a combined vaccine against rotavirus, coronavirus and Escherichia coli F5 (K99). Vet Rec 12:149–153
5. Guinee PAM, Jansen WH, Agterberg CM (1976) Detection of the K99 antigen by means of agglutination and immunoelectrophoresis in Escherichia coli isolates from calves and its correlation with enterotoxigenicity. Infect Immun 13:1369–1377