46-ff

~jot &-.J~~~ (n'fA) u-o- ~ ;S~, r.S~jYt-'

r'~ 0).':' TO~' ~~I~ o-U:..;b ... l: o-U:..;I~ ...l:~ t...f-~";.JTC,.:)I r.S.J~;;

-"ll-ITo

.J,...b r.S1.i..&.J~ u,.-S,::;)l;T ~~,JT 1$"".J.J'f ('T'rr) ~..w?~- u~-T

, ul~ ots:.:...;b )1 ~~I~ r.S1?~ ..::.i~.J~ .. l: u~~ , rf - OA r.SWL ~

ro-rT

3- Campbell, J.G. 1969: Tumours of the fowl, Poultry

Research centre,Edinburgh. William Heinemann Medical

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'tY-47

in all cases were flattened, atrophic and yellow in color

and devoid of any Graafian follicles. Adjacent to the

ovary, there were multiple nodular masses measuring 2 x

2 x 2 rom to 10 x 10 x 5 rom which were homogeneous in cut

surface and white to grey or pink in color.

No ejaculatory canals were seen. Microscopically,·

proliferation of stromal cells of ovary, presence of tes-

ticuloied tubules and tubules lined by sertoli cells were

seen in all sections prepared from affected ovaries.The

tumor-like nodules were composed of testiculoid and semi-

niferous tubules in different stages of development.

Some of the tubules contained mature spermatozoa.

The Mechanism responsible for.this gonadal change is

unknown. It is assumed that the condition is the result

of the genetic disorders.

4S-f,\

Investigation of 8 cases of sexual change due to

the Ovotestis in a commercial laying flock.

M.M. KIAEI* M.J. GHAREGOZLOU**

SUMMARY

8 Cases of ovotestis are reported in a flock of

laying commercial chickens (Leghorn breed) consisted of

2200 birds which were reard in the research field station

(Antin abad) of Veterinary School at the Teh;r:-an University

The. chickens were reared according to the recommended

standard methods. The onset of clinical signs of the

sexual changes commenced when the affected chickens were

9 months old. Abatement of the egg production,hypertrophy

of the comb and wallet, enlargment of the spur, male type

plumage, crowling and virilism were observed clinically.

Post-mortem examination revealed atrophy at magnum in

all cases. Multiple cystic dilatation of oviduct acco~

panied by atrophy of magnum and several part of the ovidu-

ct were seen in two cases with ovotestis.

The cysts contained a clear, watery fluid. The ovaries

*Dept. of Animal Nutrition & Breeding, Faculty of

Veterinary Medicine. University of Tehran, Tehran/IRAN,

**Oept. of pathobiology, Faculty of Veterinary Medicine.

University of Tehran, Tehran/IRAN.