1. Ahene R, Odamtten G, Owusu E (2011) Fungal and bacterial contaminants of six spices and spice products in Ghana. Afr J Environ Sci Technol 5(9):633–640
2. AOAC. Official Methods of Analysis (1990) Association of Official Analytical Chemists Inc. 15th Edn. Arlington, Virginia, USA
3. AOAC. Official methods of analysis (1994, 990.12) Association of Official Analytical Chemists. Aerobic plate count in food. Pour plate method, Washington, DC, USA
4. AOAC. Official methods of analysis (2000, 997.02) Association of Official Analytical Chemists. Yeast and Mold count in food. Pour plate method, Washington, DC, USA
5. Aydin A, Boston K (2006) Microbial decontamination of powdered black pepper (Piper nigrum L.) by using microwave. J Food Sci Tech 43(6):575–578