Interestingly, salmonellae were isolated from nine composites by (one or more of) the methods A! , A 2 , or B, even 

 though each of the 30 g aliquots comprising the composite were negative. Conversely, salmonellae were isolated 

 from one or more individual 30-gram aliquots of eight lots even though one or more of the three composite methods 

 were negative for these eight lots. 



The results of serotyping the salmonella isolates are presented in table 2. As expected, there was not complete 

 agreement on the serotypes found by the four techniques. However, the data are not sufficient to make statistical 



Table 2.-Serotypes isolated from positive lots by standard culture and wet compositing 



methods 



Montevideo 



Infantis 



Senftenberg 



Oranienburg 



Bredeney 



Eimsbuettel .... 

 Schwarzengrund. . 



Bareilly 



Cerro 



Ohio 



Kentucky 



Binza 



Lexington 



Tennessee 



Thomasville 



Madelia 



Alachua 



Albany 



London 



Minnesota 



Cubana 



Saint Paul 



San Diego 



Meleagridis ..... 



Siegburg 



Worthington .... 



Derby 



Newington 



Drypool 



(3), (15), 34:g,m,s 



Manhattan 



Typhimurium . . . 



Newport 



California 



Muenchen 



Give 



Canoga 



Illinois 



Indiana 



Anatum 



Heidelburg 



Arkansas 



Carrau 



Manila 



13 



5 

 10 

 8 

 6 

 7 

 3 

 1 

 3 

 2 

 3 

 4 

 2 

 2 

 5 

 2 

 1 

 3 

 2 

 3 

 2 

 2 

 2 



9 



10 



5 



5 



5 



7 



2 



3 



3 



4 



4 







3 



2 



2 







2 



3 



2 



2 



3 



4 



2 



2 



2 



2 



1 



2 



2 



2 



1 



1 









1 





1 



2 





1 



2 















1 



1 





1 



1 



2 











1 



1 



1 



















1 











1 















1 







1 



1 











1 











1 











1 















1 











1 











1 



1 











1 











































































































1 



















1 











1 











1 



The standard culture method permits isolation of more than one serotype. 



39 



