| musculus ejaculator seminis | <anatomy> In the male: origin, the perineal membrane fascia on the dorsum of the bulb of the penis; insertion, central tendon of the perineum and the median raphe on the free surface of the bulb; action, constricts bulbous urethra when attempting to expel last drops following urination, or spasmodically with ejaculation to expel semen. In the female: origin, the dorsum of the clitoris, the corpus cavernosum, and the perineal membrane; insertion, central tendon of the perineum; action, acts as a weak sphincter of the vagina; when developed, is a part of "cross-member musculature" of pelvic floor which resists prolapse of pelvic viscera. Nerve supply, pudendal (deep perineal branch). Synonym: musculus bulbospongiosus, musculus bulbocavernosus, musculus ejaculator seminis, musculus sphincter vaginae, sphincter vaginae. (05 Mar 2000) |
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| actinobacillus | A genus of pasteurellaceae described as gram-negative, nonsporeforming, nonmotile, facultative anaerobes. most members are found both as pathogens and commensal organisms in the respiratory, alimentary, and genital tracts of animals. (12 Dec 1998) |
| actinobacillus actinomycetemcomitans | A species of gram-negative, facultatively anaerobic spherical or rod-shaped bacteria that associates with species of actinomyces in actinomycotic lesions. (12 Dec 1998) |
| Actinobacillus equuli | A species causing suppurative lesions, particularly in the kidneys and joints in foals and piglets, and endocarditis in pigs. (05 Mar 2000) |
| actinobacillus infections | Infections with bacteria of the genus actinobacillus. (12 Dec 1998) |
| Actinobacillus lignieresii | A species producing infections of the upper alimentary tract and mouth in cattle and swine (actinobacillosis) and suppurative lesions in the skin and lungs of sheep; it is the type species of its genus. (05 Mar 2000) |
| actinobacillus pleuropneumoniae | A species of gram-negative, facultatively anaerobic coccobacillus-shaped bacteria that has been isolated from pneumonic lesions and blood. It produces pneumonia with accompanying fibrinous pleuritis in swine. (12 Dec 1998) |