17721032
| Question | Answer |
| Which strain of Staphylococcus causes otitis in carnivores? | S. Intermedius |
| Which Staphylococcus causes Greasy pig disease? | S..Hyicus |
| what are cultivation methods for staphylococci? | Mesophilic: 37°C, 24h, aerobic |
| Which Staphylococcus has enterotoxins? | S. Aureus |
| What is common for Staphylococcus on medium? | medium sized -1μm, varying colour- yellow/white/grey, raised, shiny |
| What is the medium used? | Enriched media meat pepton blood agar |
| Which strains cause double haemolysis? | S. Aureus S. Pseudointermedius |
| Name 3 coagulase + staphylococci | S. intermedius S. Aureus S. Hyicus |
| Name 3 coagulase - | S. saprophyticus S. epidermidis S. Haemolyticus |
| Describe microscopic features of staphylococci | Cocci in clusters, formed like grapes Gram + no flagella enveloped, encapsulated |
| What does coagulase do? | exotoxin fibrinogen-->fibrin coagulates blood plasma (rabbit) =pathogenic! |
| What are β- lactams? Which strain is more resistant? | Antibiotics that inhibit bacterial cell wall biosynthesis. S. Aureus! |
| Some characteristics of Staphylococci are: | non-motile facultative anaerobic cat + ox - gram + |
| Which strain causes Nosocomial infections? | S. Aureus |
| Name 5 enzymes found in staphylococci: | -coagulase -hyaluronidase -staphylokinase -nuclease -lipase |
| What is the agent causing nosocomial infections? | MRSA- meticillin resistant staph aureus has multiresistance to β-lactams after 72h of transmittion in tissue it becomes resistant to any treatment |
| Where can we find TSST? what does it mean? | toxic shock syndrome toxin in S. aureus |
| Name 5 toxins in staphylococci | *a-toxin *b-toxins *enterotoxins *TSST *Haemolysins |
| What is the function of staphylokinase? | activates plasminogen to plasmin to digest fibrin clots |
| In which species is MRSA common? | dog horse pig |
| Which strain is usually non-pathogenic and acts when you are immunosuppressed? it is a human saprophyte! | S. Epidermidis |
| -endometritis -pyoderma -cystitis Caused by.........? | S. Pseudointermedius in dogs |
| Which is the only non-haemolytic strain? | S. hyicus |
| -mastitis -dermatitis -subclinical/acute/chronic Caused by____in___ | 1. S. aureus 2. Bovine |
| Characteristic effect of S. aureus in ovis and capra: | folliculitis- hair follicle infection |
| pyogenic infections, opportunistic and endospore production are common for staphylococci | FALSE does not produce endospores |
| Botryomycosis caused by S. aureus is common in what species? | pigs, horses |
| What is the effect after cultivation on MacConkey agar? | nothing |
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