الفهرس 
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Abstract
Examination of 2910 samples collected from living, slaughtered or dead apparently healthy or diseased sheep and goats revealed the isolation of’ 375 inycoplasmal isolates with the incidence of 12.88% according to the digitonin sensitivity, the isolated strains were differentiated to 358 (95.46%) isolates were sensitive to digitonin, i.e. mycoplasma and 17 (4.53%) resistant to digitonin, i.e. acholeplasma which were recovered from sheep (5) and goat (12).
The 358 mycoplasma strains were classified biochemically to 4 biogroups, 250 strains (66.66%) belonged to biogroup 1, 15 strains (4.00%) to biogroup II, 32 strains (8.53%) belonged to biogroup III and 106 strains belonged to biogroup IV.
The serotyping of these 358 biochemically identified mycoplasma strains by growth inhibition test revealed the typing of 82 (22.90%) into the following 3 species:-
46 M. mycoides var capri (12.26%), 27 M. ovi pneumoniae (7.2%) and 9 M. agalactiae var agalactiae (2.4%), M mycoides var capri was isolated only from goats and not from sheep, while the reverse in case of M. ovipneumoniae which isolated from sheep only.
5 strains of M. agalactiae var agalactiae were isolated from mastitic ewes and 2 strains of M. agalactiae var agalactiae were
Discussion 106
In conclusion, the present threw through more light on mycoplasma and acholeplasma as aetiological agents of diseases in sheep and goats in Egypt. Mycoplasma laboratory diagnosis should be applied routinely in both apparently healthy and diseased animals to minimize the economic losses.
1 isolated from milk of apparently healthy ewes, while, 2 strains of M agalactiae var agalactiae were isolated from mastitic she-goats.
The recovery rate of mycoplasma in apparently healthy sheep (10.37%) were relatively lower than that of diseased ones (27.14%).
The recovery rate in diseased lambs (55.00%) was higher than diseased ewes (17.03%) and diseased rams (14.78%).
Examination of 1410 samples of goats revealed the isolation of 102 mycoplasmal strains with an incidence of 7.23% which appeared relatively lower than sheep (18.2%).
The recovery rate of mycoplasma from apparently healthy goats (3.81%) was relatively lower than diseased ones (11.23%).
Diseased she-goats had higher recovery rate of mycoplasma (23.60%) than kids (4.86%) with the recovery of M. mycoides var capri from nasal swab, pneumonic lungs