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GRAM POSITIVE BACTERIA

GRAM POSITIVE BACTERIA

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GRAM POSITIVE BACTERIA

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  1. GRAM POSITIVE BACTERIA Ross University School of Veterinary Medicine Bacteriology March 2004 Amy Fayette

  2. What is the major source of infection with Listeria monocytogenes? • Silage • pH over 5.5

  3. What is the morphology of rhodococcus equi? • Gram + • Some rods, some cocci

  4. What is a synonym of C. pseudotuberculosis? • C. ovis

  5. What is the most common sign of C. pseudotuberculosis in horses? • Ulcerative lymphangitis • Abscesses and swellings in lnn. That burst and leave ulcers

  6. What are the host factors behind rhodococcus equi? • Age- 6 weeks • Breed lines

  7. What is the bacteria that causes listeriosis? • Listeria monocytogenes

  8. What is the most common sign of C. pseudotuberculosis in sheep? • Pus filled lymph nodes

  9. What are the forms of disease caused by Listeria monocytogenes? • Neural disease- meningoencephalitis • Septicemia • Abortion • Mastitis

  10. What is the morphology of typical corynebacterium spp.? • Small gram + rods • Club-shaped swellings at one or both ends • “chinese lettering”

  11. What is the morphology of Actinomyces? • Gram + • Slender rods

  12. What causes cystitis and pyelonephritis in cattle and “pizzle rot” in sheep and goats? • Corynebacterium renale group • C. renale • C. pilosum • C. cystidis

  13. What is the disease forms associated with Actinomyces suis? • Habitat is prepuce and urethra of boar • Disease only in sow, causing cystitis and pyelonephritis

  14. How is tetanus diagnosed? • Clinical signs • Discovery of appropriate wound

  15. What is the morphology of Erysipelothrix rhusiopathiae? • Gram + • slender rods

  16. What is the main cause of pizzle rot in sheep? • High protein diet

  17. What are the main forms of erysipelas in pigs? • Septicemia • Diamond skin lesions (urticaria) • Endocarditis • arthritis

  18. What is the disease associated with Actinomyces bovis in horses? • Infection of bursae in horses • “poll evil” or “fistulous withers”

  19. What is the bacteria associated with Swine erysipelas? • Erysipelothrix rhusiopathiae

  20. What is the morphology of Listeria monocytogenes? • Small gram + rods • May be coccoid

  21. How is Listeria typically enriched in the laboratory? • “cold enrichment”

  22. What is the morphology of Arcanobacterium pyogenes? • Small gram + rods • Resemble corynebacterium

  23. What is the disease associated with Actinomyces bovis in cattle? • “lumpy jaw” • Caused by erupting teeth or abrasive food

  24. What are the disease forms associated with clostridium sordellii? • Isolated from sudden deaths, and “big head” in rams

  25. What are the disease forms associated with clostridium botulinum in wild birds? • “limberneck”- ingestion of rotting vegetation and dead invertebrates • Ingestion of dead fish

  26. What are the signs associated with rhodococcus equi? • Bronchopenumonia • Extensive anscessation and lymphangitis • Necrotizing enterocolitis with ulceration

  27. What is the disease forms associated with Nocardia asteroides? • Cattle • mastitis • Dogs, cats • aspiration of organisms • Blood stained purulent fluid in pleural cavity

  28. What are the disease forms associated with clostridium perfringes Type A? • Gas gangrene (man and occasionally animals) • Food Poisoning (man • Colitis in horses • Necrotic enteritis in chickens • Enterotoxemic jaundice in lambs

  29. What is another name for Rhodococcus equi? • Corynebacterium equi

  30. What are the predisposing factors of dermatophilus congolensis? • Prolonged rainfall • Humid conditions • Heavy tick infestation

  31. What are the disease forms associated with clostridium perfringes Type B? • Lamb dysentery • 2d-2wks old • Causes severed diarrhea sometimes with blood • Neonatal hemorrhagic enteritis in calves and foals • Enterotoxemia in adult sheep and goats

  32. What is the morphology of dermatophilus congolensis? • Gram + rods • Branching filaments • Motile zoospores

  33. What is the significance of Corynebacterium bovis? • Commensal of bovine udder • Provokes neutrophil response, thought to protect the udder from more serious infections

  34. What are the disease forms associated with clostridium perfringes Type C? • Hemorrhagic enterotoxemia- esp. in neonatal piglets, lambs, foals and calves • Necrotic enteritis- chicks under 2 weeks • Enterotoxemia in post weaning/ adult sheep in Britain and adult goats

  35. What is the general lesion produced by actinomyces spp.? • Pyogranulomatous lesions • Presence of hard “sulfur granules”

  36. What is the morphology of bacillus spp.? • Large gram+ rods • Aerobic or facultative anaerobic • Sporeforming • Catalase +

  37. What are the disease forms associated with clostridium perfringes Type D? • Enterotoxemia (“pulpy kidney”) • Associated with change in diet usually for better • Increases cerebral pressure which causes nervous signs • Also causes hydropericardium, and edema of lungs • Hyperglycemia, and glucosuria • Enterotoxemia in goats and possibly cattle

  38. What are the cultural characteristics of streptococcus? • Facultative anaerobes • Catalase neg (staph catalase pos)

  39. What are the cultural characteristics of Actinomyces? • Anaerobic or microaerophilic- some CO2 prefered

  40. What are the disease forms associated with Staph hyicus? • “Greasy pig disease” • “exudative epidermitis” • Primarily in Suckling piglets • Excessive sebaceous secretion • Subacute disease- thickening and wrinkling of skin

  41. What is the disease forms associated with bovine farcy? • Nocardia sp. • Infection of the lymphatics of the lower limbs or head of cattle

  42. What are the disease forms associated with clostridium perfringes Type E? • Enteritis/enterotoxemia in calves and lambs

  43. What is the morphology of Nocardia spp. • Slender gram + rods and filaments • Modified acid-fast

  44. What are some synonyms of dermatophilus congolensis? • Cattle- dermatophilosis, streptothricosis, senkobo skin disease • Sheep- lumpy wool, mycotic dermatitis, strawberry footrot • Horse- rain scald

  45. What are the disease forms associated with staph intermedius? • Pyoderma in dogs and cats • Lesions in skin folds • Otitis externa

  46. What is the disease forms associated with B. anthracis? • Septicemia with sudden death • Dark, tarry unclotted blood oozing from orifices • Spleen is greatly enlarged

  47. What is the disease forms associated with Actinomyces hordeovulneris? • Injury by grass awns • Local abscesses and serositis

  48. What are the disease forms associated with clostridium piliforme? • Was: bacillus piliformis • Aka: tyzzers disease • Enteritis of lower small intestine and proximal large intestine and focal necrosis of liver • Disease seen in young animals

  49. What are the three most common streptococci associated with bovine mastitis? • S. agalactiae • S. dysgalactiae • S. uberis

  50. What is the disease forms associated with dermatophilus congolensis? • Scab and crust formation with shallow clean wound underneath