Shigella Species Isolated in Hongkong with Special Reference to Drug-Resistance of Strains

One hundred and seventy-one Shigella strain isolated in Hongkong during a period from 1959 July, to June, 1964 were classified serologically. All of the strains, 105 belonged to Sh. flexneri, 2 to Sh. boydii and 64 to Sh. sonnei. These strains were mainly originated from patients who had clinically been diagnosed as bacillary dysentery and from patients having some or other gastro-intestinal complaints, but it worth special mention that there were 3 cases of extra-intestinal shigellosis. Sensitivity tests to 8 kinds of antibiotics or chemotherapeutic drugs were carried out every year. Sensitive strains to sulfafurazole could hardly be found, and emergence of resistant strains to streptomycin showed a yearly increase. Since 1962 the multiple resistant strains of CTS pattern have increased particularly