1- BATISTA M., CALERO P., RODRIGUEZ F., GONZALEZ F., CABRERA F., GRACIA A., Structural changes in the testes and epididymides of bucks 16 weeks after bilateral vasectomy, Vet. Rec., 2002, 151, 740-741

2- CHAND P., SADANA J.R., MALHOTRA A.K., Epididymo-orchitis caused by Brucella melitensis in breeding rams in India, Vet. Rec., 2002, 150, 84-85

3- FATIMAH I., IKEDE O., MUTALIB R.A., Granulomatous orchitis and periorchitis caused by Pseudomonas pseudomallei in a goat, Vet. Rec., 1984, 114, 67-68

4- FERRERAS M., MUÑOZ M., PEREZ V., BENAVIDES J., GARCIA-PARIENTE C., FUERTES M. et al, Unilateral orchitis and epididymitis caused by Salmonella enterica subspecies diarizonae infection in a ram, J. Vet. Diagn. Invest., 2007, 19, 194-197

5- FRASER A.F., PENMAN J.H., A clinical study of ram infertilities in Scotland, Vet. Rec., 1971, 89, 154-158

6- GOULETSOU P.G., FTHENAKIS G., CRIPPS P., PAPAIOANNOU N., LAINAS T., PSALLA D. et al., Experimentally induced orchitis associated with Arcanobacterium pyogenes: clinical, ultrasonographic, seminological and pathological features, Theriogenology, 2004, 62, 1307-1328

7- GOULETSOU P.G., FTHENAKIS G.C., Ovine orchitis, with special reference to orchitis associated with Arcanobacterium pyogenes, Small Rumin. Res., 2006, 62, 71–74

8- GOULETSOU P.G., FTHENAKIS G.C., TZORA A., CRIPPS P.J., SARATSIS P., Isolation of Arcanobacterium pyogenes from the scrotal skin and the prepuce of healthy rams or from rams with testicular abnormalities, Small Rumin. Res., 2006, 63, 177–182

9- HAJTOS I., FODOR L., VARGA J., MALIK G., Ovine suppurative epididymo-orchitis caused by Histophilus ovis, J. Vet. Med. B, 1986, 33, 528-536

10- HUTSON L.R., Observations on staphylococcal infections in the dairy goat, Vet. Rec., 1950, 62, 274

11- JANSEN B.C., The epidemiology of bacterial infection of the genitalia in rams, Onderspoot J. Vet. Res., 1983, 50, 275-282

12- LAWS L., ELDER J.K., Ovine epididymo-orchitis caused by Actinobacillus lignieresi, Aust. Vet. J., 1969, 45, 384

13- LEES V.W., MEEK A.H., ROSENDAL S., Epidemiology of Haemophilus somnus in young rams, Can. J. Vet. Res., 1990, 54, 331-336

14- MBAI K., MUNYUA S.J.M., GATHUMBI P.K., MBIUKI S.M., Actinobacillus seminis as a cause of ram infertility in Kenya, Small Rumin. Res., 1996, 21, 227-231

15- MCILWAIN P.K., BOLIN F.M., A Mycoplasma associated with ovine orchitis, Am. J. Vet. Res., 1967, 28, 885-887

16- MEMON M.A., male infertility, Vet. Clin. North Am. Large Anim. Pract., 1983, 5, 619-635

17- MOBINI S., HEATH A.M., PUGH D.G., Theriogenology of sheep and goats, In PUGH DG, Sheep and goat medicine, Philadelphia: WB Saunders Co, 2002, 129-186

18- MUSA M.T., JAHANS K.L., The isolation of Brucella melitensis biovar 3 from a testicular hygroma of a ram in a nomadic flock of sheep and goats in western sudan, J. Comp. Pathol., 1990, 103, 467-469

19- NOAKES D.E., PARKINSON T.J., ENGLAND G.C.W., Orchitis and epididymitis, In: ARTHUR G.H., NOAKES D.E., PEARSON H., Veterinary reproduction and obstetrics, 8th Ed, Philadelphia: WB saunders, 2001, 730-733

20- SARGISON N.D., MACRAE A.I., SCOTT P.R., BAIRD P., Investigation and management of necrotising orchitis associated with a scrotal haematoma in a texel ram, Vet. Rec., 2003, 153, 752-753

21- SIDDIQUI H.U.R., AHMAD A., KHAN Z., Pathological studies on testes of the ram, J. Agri. Soc. Sci., 2005, 1, 75-77

22- SMITH M.C., SHERMAN D.M., Reproductive system, In: Goat medicine, Philadelphia: Lea & Febiger, 1994, 411-463

23- WALKER R.L., LEAMASTER B.R., Prevalence of Histophilus ovis and Actinobacillus seminis in the genital tract of sheep, Am. J. Vet. Res., 1986, 47, 1928-1930

24- WARD A.C.S., WEISER G.C., ANDERSON B.C., CUMMINGS P.J., ARNOLD K.F., CORBEIL L.B., Haemophilus somnus (Histophilus somni) in bighorn sheep, Can. J. Vet. Res., 2006, 70, 34-42

25- WILLIAMSON P, NAIRN M.E., Lesions caused by Corynebacterium pseudotuberculosis in the scrotum of rams, Aust. Vet. J., 1980, 56, 496-498