| Abstract: |
1- A total of 150 rats and mice (100 for bacteriological andparasitological examination, and 50 for control experiment)of different species ; Raitcus rat~~ E?t~, Ra~~ ra~~~us.::_o.ryegic.1-1..§., Arv.i~..?..pthus. niloticus) ~comE £.aJ?1.Finus andMu~ ~sculus were captured from different localities ofCairo and Giza.2- Bacteriological examination of the internal organs (liver,spleen, lungs, heart, kidneys and precrural lymph nodes) of100 rats and mice was done for the isolation of pathogens.In addition, contents of the large intestine were bccter-iologically examined for Enterobacteriaceae.3- The incidence of the isolated organisms from the Lnce rnaIorgan El were : stap’~;Y_~()_c.o.c_~ §iu~eus(36) ,StaJ?_~~.l.o_c.()_c_c~92idermidis(45), St.reptococcus pyogene s(15» .. Streptococcus!aecalis(15), L?Jt£~.p-tococ_cJ.J.s :;;;P_~~~1LS.. (4), streptococcuszymof=;enes(2), streptococcus canis(1) Corynebacterium pyogen~~(39), Corynebacte£ju~ renale(9), Corynebacteri~m Dseudo-tuberculosis(9) t CQrynebacterill.m muriseptica(25), G?!f}~a(9), Pseudomonas?eruginosa (12), Sarcina (3), anthracoides(65) and l~r;zsipelothrix insidiosa(1.3).4- Of the family Enterobacteriaceae isolated from the intestinalcontents, the following organisms were encountered : Escherichia£2.11. (45), .. :sc heric hi.a.. freundii(33), h.erobac ter (30), Paracolon(25), Proteus (46), Klebsiella nneumoniae(23), shigellae (8),r-;almonella typhimurium(2) and Salmonella enteritidis(1).
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