[Report 1931] / Medical Officer of Health, Liverpool Port Health Authority.

  • Port Health Authority of Liverpool. n 2014184020.
Date:
1931
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: [Report 1931] / Medical Officer of Health, Liverpool Port Health Authority. Source: Wellcome Collection.

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    The following Table shows the number of Fumigations of Vessels during the past nine years and the number of Exemptions for 1928-1931, together with the number of rats and mice discovered after fumigation dur ing the same period and the average number of rats and mice per vessel Year. ( ! Number of Fumigations. Number of Exemptions. Total Number of Rats found after Fumigations. Total Number of Mice found after Fumigations. Average Number of Rats per Vessel. Average Number of Mice per Vessel. 1923 90 -— 5,295 57 58-83 0-63 1924 132 7,388 300 55-96 2-27 1925 119 — 4,817 257 40-47 2-15 1926 156 ■— 3,433 111 22-00 0-71 1927 119 — 1,967 130 16-52 1-09 1928* 130 11 1,804 190 12-79 1 -46 1929 221 114 2,614 292 7-80 1-32 1930 187 316 1,762 75 3-50 0*40 1931 162 314 966 182 2-02 0-38 1 * In 1928 the first International Certificate was issued- on the 5th October. During that year 25 Deratisation and 1 1 Exemption Certificates were issued.