Abstract
1Laboratoire de Microbiologie des Sols, ORSTOM BP 1386, Dakar, Senegal, West Africa
2Department of Applied Chemistry & Microbiology, University of Helsinki, PO Box 56, Biocentre 1, Viikinkaari 9, FIN-00014 Helsinki, Finland
3Laboratorium voor Microbiologie, Universiteit Gent, K.-L. Ledeganckstraat 35, B-9000 Ghent, Belgium
4Microbiology Department, Reading Laboratory, Institute of Food Research, Whiteknights Road, Reading RG6 6BZ, UK
5Escola Superior de Agricultura de Lavras, Caixa postal 37, CEP 37200-970, Lavras MG, Brazil