Create
Learn
Share

BacT Midterm 2

rename
brichar3's version from 2016-03-01 01:51

Section 1

Question Answer
ErysipelothrixNonmotile, G+ve rods...... Filimentous in chronic infection (via fish meal)...... 45% of arthritis
Erysipelothrix DiagnosisCulture, Gram stain, Motility test, Cull chronic cases
Erysipelothrix treatment:Penicillin, Ampicillin, Vaccine
Erysipelothrix causes:Swine erysipelae, Septicemia (turkey, young pigs) – fever, skin patches.... Cardiac form: valvular endocarditis, dyspnea .......Arthritis (sheep)...... Erysipeloid in humans..... Diamond shaped lesions (skin form) *Death if untreated
Listeria monocytogenesNon contagious (sheep, cattle, goats, humans)..... G+ve cocco-bacilli........ Psychotrophic....... Grows (3-45 C)......... Habitat: Saprophyte, poor quality silage
Listeria monocytogenes causesCircling disease....... Abortion..... Meningitis .......Facial paralysis + head tilt (sheep) ......Mastitis, iritis, KCJ (cows)
Listeria monocytogenes diagnosis Culture BA...... PCR (commercial kits)
Listeria monocytogenes treatment:Eliminate bad feed ......Prevent abrasions to eye from feed....... Penicillin, Ampicillin, Tetracycline
memorize

Section 2

Question Answer
Bacillus AntracisG+ve spore forming rods...... Capsules
Bacillus Antracis symptoms:Antrax (bloody tarry substance from rectum + epistaxis)..... Ruminants, horses, humans (highly susceptible)...... Birds resistant.......... Cutaneous lesions
Bacillus Antracis diagnosis:Blood smear .......No Post Mortem ......... 1:1000 mercuric chloride (5 mins kills spores)
Bacillus Antracis treatment:Vaccine........ Penicillin (chemophylaxis), ciprofloxacin (humans)....... Incinerate and bury bodies
The tripartite toxin The tripartite toxin secreted by Bacillus anthracis, the causative agent of anthrax, helps the bacterium evade the immune system and can kill the host.
The tripartite toxin methods of action. 1) edema factor 2) protective antigen 3) lethal factor
memorize

 

Question Answer
Clostridium: (G+ve spore forming rods, Anaerobic)
C. tetani morphologyDrumstick spores .... Neurotoxin and tetanotoxin
C. tetani symptomsTetanus (lock jaw).... Spastic paralysis ..... Salivation (mouth paralyzed)..... 3rd eye lid paralysis
C. tetani diagnosisWand smear + culture
C. tetani treatmentVaccine Antitoxin or Penicillin
Source of C. botulinumBad hay > botulinum toxin Encoded by bacteriophages
C. botulinum disease Botulism.... Respiratory paralysis...... Flacid paralysis > protruding tongue ..... Limberneck, paralysis of eyelid (birds)
C. botulinum diagnosis Clinical symptoms, Examine feed, Test blood/serum (ELISA)
C. botulinum treatmentVaccines for mink, pheasants, cattle, horses, Antitoxin, Activated charcoal
C. chauvoeiCauses blackleg in cattle
C. chauvoei diagnosis:Clinical signs, Muscle smear + gram stain
C. chauvoei treatment: Vaccine Penicillin
Histotoxichypoxia (also called histoxic hypoxia) is the inability of cells to take up or utilize oxygen from the bloodstream
Histotoxic bacterium C. septicum, C. novyi
C. perfringens is? Enterotoxic
C. perfringens disease Necrotic enteritis (piglet, chickens.....) Enterotoxemia (sheep) .....Diarrhea/hemorrhagic entritis (dogs, horses))...... Yellow lamb disease....... Gangrenous mastitis
C. perfringens diagnosisFecal smear, ELISA w/ toxin (or latex aggln. Test)
C. perfringens treatmentTylosin or metronidazole (dogs)........ High fiber diet ...... Vaccine...... Penicillin + metronidazole (horses)
memorize

Section 3

Question Answer
Mycobacterium G+ve, aerobic
Mycobacterium Stain?Don’t gram stain > ACID FAST (stain red)
Mycobacterium doubling time? 24 Hour Doubling Time
M. Bovis growing mediaGrows in egg-based media
M. Bovis disease Tb (cows, humans, monkeys), Nodules in lung, lnn, intercostal space, Nodules contain macrophages
M. Bovis treatment Cull food animals (not treated)
M. tubercolosis diseaseTb (humans, parrots, monkey, elephant), Grows in egg based media, Zoonotic
M. tubercolosis diagnosis Tb test, Agglutination test, ELISA, Post mortem, Gamma-IFN test, Culture
M. tubercolosis treatment Regular testing, Quarantine, Disinfect premises
M. avian paratuberculosisJohnes disease (cows, sheep, goat) > chronic diarrhea, Asymptomatic shedders, Stays dormant for 2 yrs (calves), From fecal matter
M. avian paratuberculosis diagnosis Rectal microscopy, Fecal smeal + culture, ELISA, Johnin skin test
M. avian paratuberculosis treatment Cull, Separate newborn calves, Hygiene, Regular testing
M. leprae/ chronic form?Leprosy (humans, armadillos) – Hansens disease (chronic), Zoonotic
M. leprae diagnosis: Lepromin test, ELISA
M. leprae treatment:Dapsane
M. lepraemurium: Feline leprosy, not zoonotic
M. lepraemurium treatment: Surgical removal of nodules
memorize

Section 4