SUMMARYA total of 181 samples of irrigation water from the farmlands of Granada were examined for the presence ofSalmonellaspp. At the same time 849 samples of the crops from these farmlands and of vegetables sold in city market-places were studied. Sampling was done regularly over the period of study which ran from March 1981 to February 1983. Isolates from these sources were compared with 93 salmonellas isolated from human pathological material at various hospitals of the city of Granada from 1979–80, and again from 1981–3.The most commonly isolated serotypes of human origin wereS. typhimuriumandS. enteritidis. In irrigation waters and in crops,S. typhimurium, S. kapemba, S. londonandS. blockleywere found to be the most common. The results indicate a close relationship between the isolates from the irrigation waters and those from the vegetables, but their relationship to prevalent human infections is less clear.
Comparative Study of the Total Cellular Fatty Acids of Staphylococcus Species of Human Origin
