ISOLATES TYPED BY THE SALMONELLA REFERENCE LABORATORY AND THE ESCHERICHIA COLI SEROTYPING LABORAWRY DURING 1975 Salmonella Reference Lnboratory During 1975 the laboratory received 8,968 isolates Major sources of the 12 most frequently occurring for serotyping, representing 131 different serotypes. Of serotypes in the non-human subgroup are listed in these isolates 7,608 were of Australian origin- 1,843 Table I. human, 5,765 non-human. TABLE I
Serotype typhi-rnurium unatum derby hovi.s-tnorbificans Chester S. johannesburg S. infantis S. singapore S. havana S. iennessee S. adelaide S. newington
S. S. S. S. S.
Cattle
Sheep
158
62
61 3 3 77 39 217
-
60 92 18 62
Animal Swine Chicken Feeds 28
488 5 10
27 10 2
11 1
-
-
10
35 10
7
42 60 11 1
5
-
-
-
-
2
-
30 42
-
-
-
-
1
Sewage Abattoir Effluent Swabs 63 9 14 14 15
54 446 440 3 111
34 1 36 18 27
-
-
32 23 21 12 12
Total Nonhuman Isolates
?6
1314 612 517 436 26 1 227 190 183 171 160 142 142
22.8 10.6 9.O 7.6 4.5 3.9 3.3 3.2 3.O 2.8 2.5 2.5
9
69 63
-
Total 4355 75.5% The most frequently isolated serotypes from man in Australia were: S. typhi-muriurn (933, 50.6%), S.
bovis-morbificans (91, 4.9%), S . muenchen (67, 3.6%), S . havana (60, 3.3%), S. newport (47, 2.6%), S. Chester (44, 2.4%), S. derby (41, 2.2%), S . oranienburg (34, 1.8%), S. senftenberg (34, Is%), S . singapore (30, 1.6%).
E. coli Serotyping Laboratory During 1975, 1,287 strains of E. coli were received for serotyping. Of these, 645 were veterinary isolates. Although the H-antigens of all strains were determined,
0-antigens only were considered in compiling this summary because of the wide diversity of serotypes characterised. The most frequently isolated 0-antigen groups for particular species are listed in Table 2.
TABLE 2 SWINE
0Grom
CATTLE
No. of Strains
%
0 Group
SHEEP
No. of Strains
%
OGroup
OTHERS
No. of Strains % ~~
0141 08 076 09 095 06 060 068 075 0-smooth non-typable O-autoagglutinable
Total isolates
44 28 21 15 10 7 7 8 8
12 8 6 4 4 2 2 2 2
49
13
23
6 369
08 075 0121 076 01 1 06 0-smooth non-typable O-autoagglutinable
12 5 5 4 4 4
5 3 3 2 2 2
63
30
6
3 I ~
Total isolates
229
I
Division of Clinical Microbiology, Institute of Medical and Veterinary Science, Adelaide, South Australia, 5000 12 September I976 Australiati veterinary Jocrrtial, Vol. 52, November, 1976
08 03 042 0152 018ab 018gc 039 0131 0150 0156 0-smooth
3 Group
No. of Strains
%
11 3 3 3 3
14 4 4 4 4
20
25
3
4
~
2
14
1
7
1 1 1 1 1
7 7 7 7 7
1
7
3
23
i
1
i
7
06 02 08 088 01 13 0-smooth non-typable 0-autoagglutinable
non-typable
zz;iies
14
Total isolates
79
Suzanne F. DIXON, B.Sc., A.A.I.F.S.T.
545