Exam 2 Flashcards
Listeria monocytogenes:
Gram + or Gram -?
Gram +
Listeria monocytogenes:
Species affected?
ruminants
Listeria monocytogenes:
Associated with:
CNS infection in ruminants, septicemia in monogastrics, abortion in ruminants
Listeria monocytogenes:
Shape
Rod
Listeria monocytogenes:
Aerobe/Anaerobe?
Facultative anaerobe
Listeria monocytogenes:
intra/extracellular?
facultative intracellular
Listeria monocytogenes:
predisposing factors?
nutritional deficiency, immunosuppression, pregnancy. poor quality feed, high environmental load
Listeria monocytogenes:
entry
most commonly by ingestion. infrequently by inhalation
Listeria monocytogenes:
encounter
endogenous: carried in the intestinal tract of many animals
exogenous: soil, decaying vegetation, contaminated feed
Listeria monocytogenes:
Testing
aerobic culture, PCR
Listeria monocytogenes:
Tx
Abx: penecillin and tetracyclines. Supportive care.
Streptococcus suis:
species/age associated
pigs, usually between 3-12 weeks of age, but all ages susceptible
Streptococcus suis:
Gram + or Gram -
Gram +
Streptococcus suis:
shape
cocci in chains
Streptococcus suis:
aerobe/anaerobe?
facultative anaerobe
Streptococcus suis:
intra/extracellular
extracellular
Streptococcus suis: found as a part of the ? of mucous membranes and GI tract
microbiota
Streptococcus suis:
alpha or beta hemolytic?
alpha hemolytic
Streptococcus suis:
encounter
endogenous: many pigs carry it in the tonsils and nasal cavity
Exogenous: introduction of carrier pigs, fomite transmission
Streptococcus suis:
entry
inhalation, ingestion, or direct contact with carriers
Streptococcus suis:
testing
aerobic culture, PCR, may consider antimicrobial susceptibilty testing
Streptococcus suis:
Tx
abx therapy: penicillin or ampicillin. Supportive care. Reduce stress.
Streptococcus suis:
prevention
stress mitigation, hygeine. No commercial Vx available
Streptococcus equi subsp equi:
alpha or beta hemolytic?
beta hemolytic
Streptococcus equi subsp equi:
causative agent of?
equine strangles
Streptococcus equi subsp equi:
affected species?
equine
Streptococcus equi subsp equi:
gram + or gram -
Gram +
Streptococcus equi subsp equi:
shape
cocci in chains
Streptococcus equi subsp equi:
aerobe/anaerobe?
facultative anaerobe
Streptococcus equi subsp equi:
intra/extracellular
extracellular
Streptococcus equi subsp equi:
encounter
exogenous: contact with horses with active Dz
Streptococcus equi subsp equi:
normal flora?
NO
Streptococcus equi subsp equi:
entry
inhalation, ingestion, direct contact, fomite transmission
Streptococcus equi subsp equi:
Testing
PCR, Aerobic culture, SeM ELISA
Streptococcus equi subsp equi:
Tx
supportive care. Abx therapy is controversial.
Streptococcus equi subsp equi:
prevention
Vx, quarantine of new additions, isolation in affected horses
Yersenia pestis:
causative agent of?
plague
Yersenia pestis:
species associated
companion animals (mostly cats) and wildlife
Yersenia pestis:
Gram + or Gram -
Gram -
Yersenia pestis:
Shape
Rod
Yersenia pestis:
aerobe/anaerobe
facultative anaerobe
Yersenia pestis:
intra/extracellular
facultative intracellular
Yersenia pestis:
encounter
exogenous: contact with rodent fleas or infected rodents. soil contaminated with bacteria
Plague is maintained in a ? cycle between ? and ?
maintained in a sylvatic cycle between rodents and rodent fleas
Yersenia pestis:
entry
inhalation, percutaneous (flea bites, cuts, wounds)
Yersenia pestis:
Testing
PCR, aerobic culture
Yersenia pestis:
Tx
Aminoglocosides, doxycycline, fluoroquinolones, supportive care
Yersenia pestis:
prevention
avoid rodent areas in endemic areas, environmental hygeine, insect repellent, PPE, know geographic risk!
Francisella tularensis:
causative agent of?
tularemia
Francisella tularensis:
species affected?
most common in rodents and lagomorphs. also in cats.
Francisella tularensis:
Gram + or Gram -
Gram -
Francisella tularensis:
shape
rod
Francisella tularensis:
aerobe/anaerobe?
facultative anaerobe
Francisella tularensis:
intra/extracellular
facultative intracellular
Francisella tularensis:
encounter
exogenous: contact with infected rodents and lagomorphs. contact with water and soil contaminated carcasses. contact with arthropods
Francisella tularensis:
entry
arthropod bites, ingestion, inhalation, direct contact
Francisella tularensis:
minimally or highly infectious?
highly infectious (</= 10 cfu!!)
Francisella tularensis:
clinical signs
fever, lymphadenopathy, lethargy
Francisella tularensis:
Testing
Aerobic culture (chocolate agar!), PCR, serology
Francisella tularensis:
Tx
usually only pursued in cats and dogs. Antimicrobial therapy (gentamycin, doxy, fluoroquinolones), supportive care.
Francisella tularensis:
prevention:
avoid rodent/rabbits in endemic areas. Environmental hygeine, insect repellent, PPE, know geographic location!
Bacillus anthracis:
causative agent of
anthrax
Bacillus anthracis:
species affected
ruminants (but zoonotic!)
Bacillus anthracis:
Gram + or Gram -
Gram +
Bacillus anthracis:
shape
rod
Bacillus anthracis:
aerobe/anaerobe
obligate aerobe
Bacillus anthracis:
intra/extracellular
facultative intracellular
Bacillus anthracis:
encounter
exogenous: spore contaminated soils/food and water. Geography: certain soil conditions maintain B. anthracis
Bacillus anthracis:
entry
ingestion, inhalation, percutaneous
Bacillus anthracis:
clinical signs
peracute septicemia, peracute death, unclotted blood, lack of rigor
Bacillus anthracis:
Tx
antibacterial agents (penicillin, tetracyclines)
Bacillus anthracis:
Prevention
Vx in endemic area (strain lacks pOX2 encoding capsule), proper disposal of carcasses, post-exposure prophylaxis, PPE
Mycobacteria:
Gram + or Gram -
Gram +, Acid Fast +
Mycobacteria:
shape
rod
Mycobacteria:
aerobe/anaerobe
obligate aerobe
Mycobacteria:
intra/extracellular
facultative intracellular
Mycobacteria:
testing
Caudal fold test
Mycoplasma:
Gram + or Gram -
Gram + (NO CELL WALL!)
Mycoplasma:
shape
pleiomorphic (can have many shapes)
Mycoplasma:
aerobe/anaerobe
facultative anaerobe
Mycoplasma:
intra/extracellular
facultative intracellular
Mycoplasma:
Tx limitation?
cannot use Beta Lactams! they act to inhibit cell wall synthesis
Clostridium botulinum:
causative agent of
botulism, flaccid paralysis
Clostridium botulinum:
species affected
wild birds, horses, ruminants, mink, foxes. Dogs, cats and pigs are resistant!
Clostridium botulinum:
Gram + or Gram -
Gram +
Clostridium botulinum:
shape
large rod
Clostridium botulinum:
aerobe/anaerobe
obligate anaerobe
Clostridium botulinum:
intra/extracellular
extracellular
Clostridium botulinum:
encounter
exogenous: aquatic enviros and soil contaminated with vegetative cells, spores, and toxin. rotting plant and animal matter contaminated with vegetaive cells, spores, and toxin.
Clostridium botulinum:
entry
ingestion, introduction into wounds
Clostridium botulinum:
Dx
mainly based off of clinical signs: absence of fever,muscular incoordination, mydriasis, dysphagia, flaccid paralysis
Clostridium botulinum:
testing
mouse bioassay to detect toxin, ELISA, Anaerobic culture or PCR if toxicoinfectious form is suspected
Clostridium botulinum:
Tx
Antitoxin (will not impact bound toxin), supportive care. May is antimicrobials for toxicoinfectious cases.
Clostridium botulinum:
prevention
Toxoid Vx in high-risk species, proper food preservation, carcass management on farms. difficult in wild birds.
Clostridium tetani:
causative agent of
tetanus, spastic paraylsis
Clostridium tetani:
species affected
all mammals susceptible, but there are varying levels. horses and humans more susceptible.
Clostridium tetani:
Gram + or Gram -
Gram +
Clostridium tetani:
shape
large rod
Clostridium tetani:
aerobe/anaerobe
obligate anaerobe
Clostridium tetani:
intra/extracellular
extracellular
Clostridium tetani:
encounter
exogenous: found in soil, can be found transiently in the intestines or horses and other animals
Clostridium tetani:
Entry
penetrating injuries, Sx, injections, invasive procedures, shearing, postpartum uterine infection, umbilical infections, small animal fights…..
Clostridium tetani:
Dx
based on wound or Hx of recent infections.
Clostridium tetani:
Testing
Anaerobic culture or PCR can be performed but not necessary in most cases.
Clostridium tetani:
Tx:
Antitoxin (won’t impact bound toxin), wound care, Abx therapy (penicillin, metronidazole), sedatives and muscle relaxants, supportive care
Clostridium tetani:
prevention
toxoid vaccination for highly susceptible species (equine, ruminants, humans), proper wound cleaning and dressing, aseptic surgical procedures +/- prophylactic antitoxin after Sx
Anaplasma marginale:
member of
Rickettsiales
Anaplasma marginale:
causative agent of
bovine anaplasmosis
Anaplasma marginale:
Gram + or Gram -
Gram -
Anaplasma marginale:
shape
coccoid to short rod
Anaplasma marginale:
aerobe/anaerobe
obligate aerobe
Anaplasma marginale:
intra/extracellular
obligate intracellular
Anaplasma marginale:
encounter
exogenous: geographic area of dermacentor tick vector. chronic, subclincally infected animals.
Anaplasma marginale:
entry
tick bites, flea bites, iatrogenic
Anaplasma marginale:
Testing
serology (ELISA), PCR of whole blood or tissue. Blood smear to look for organism in erythrocytes (will be in the outer margin!)
Anaplasma marginale:
Tx
Oxytetracycline (less successful the lower the PVC), chlortetracycline, supportive care
Anaplasma marginale:
prevention
allow cattle to become naturally infected at a young age. No vx
Anaplasma marginale:
predisposing factors
adult animals >3 years most susceptible to severe Dz
Neorickettsia helminthoeca:
member of
Rickettsiales
Neorickettsia helminthoeca:
causative agent of
Salmon Poisoning Disease
Neorickettsia helminthoeca:
species affected
dogs, wild canids, raccoons, bears
Neorickettsia helminthoeca:
Gram + or Gram -
Gram -
Neorickettsia helminthoeca:
shape
coccoid to short rod
Neorickettsia helminthoeca:
aerobe/anerobe
obligate aerobe
Neorickettsia helminthoeca:
intra/extracellular
obligate intracellular
Neorickettsia helminthoeca:
encounter
exogenous: complicated, found in the fluke Nanophyetus salmincola which has a snail and fish intermediate host
Neorickettsia helminthoeca:
entry
ingestion of uncooked or undercooked infected fish tissue
Neorickettsia helminthoeca:
testing
parasitology including fecal float and sedimentation. PCR (not usually performed on feces)
Neorickettsia helminthoeca:
tx
doxycyline for bacterial infection, praziquantal for fluke infection. supportive care
Neorickettsia helminthoeca:
prevention
do not feed uncooked or undercooked fish!
Rickettsia rickettsia:
causative agent of
Rocky mountain spotted fever
Rickettsia rickettsia:
affected species
dogs and humans
Rickettsia rickettsia:
Gram + or Gram -
Gram -
Rickettsia rickettsia:
shape
coccoid to short rod
Rickettsia rickettsia:
aerobe/anaerobe
obligate aerobe
Rickettsia rickettsia:
intra/extracellular
obligate intracellular
Rickettsia rickettsia:
encounter:
exogenous: infected dermacentor ticks
Rickettsia rickettsia:
entry
tick bite. conjunctival route, could be passed thru contact in a lab environment
Rickettsia rickettsia:
testing
Ab titer testing, PCR, culture not routinely done
Rickettsia rickettsia:
Tx
Antimicrobial therapy (doxycycline), supportive care
Rickettsia rickettsia:
prevention
use of acaricides, avoidance of tick habitats
Borrelia burgdorferi:
causative agent of
Lyme Dz
Borrelia burgdorferi:
affected species
dogs, horses, people
Borrelia burgdorferi:
Gram + or Gram -
Gram -
Borrelia burgdorferi:
shape
spirochete
Borrelia burgdorferi:
aerobe/anaerobe
micro-aerophilic
Borrelia burgdorferi:
intra/extracellular
extracellular
Borrelia burgdorferi:
encounter
exogenous: infected ticks. Maintined in a sylvatic cycle between ticks, rodents, birds, and larger wild animals. maintained in tick transtadially
Borrelia burgdorferi:
entry
Tick bite - tick must be attached for > 24 hrs for efficient transmission
Borrelia burgdorferi:
testing
Serology most common.
Borrelia burgdorferi:
Tx
antimicrobial therapy (doxy), supportive care depending on site affected
Borrelia burgdorferi:
prevention
Vx (dog only), tick control, avoidance of tick habitat
Borrelia burgdorferi Vx
against OspA or Osp A & Osp C
Borrelia burgdorferi:
Osp A is found ?
how does this affect the Vx?
in the tick, so Ab in the Vx interacts with the bacteria in the tick
Mannheimia Haemolytica:
member of what resp disease complex?
BRDC
bovine
Mannheimia Haemolytica:
Gram + or Gram -
Gram -
Mannheimia Haemolytica:
shape
rod
Mannheimia Haemolytica:
aerobe/anaerobe
facultative anaerobe
Mannheimia Haemolytica:
intra/extracellular
extracellular
BRDC testing
aerobic culture, antimicrobial susceptibilty testing is recommended, PCR, serology available for viral pathogens
BRDC Tx
Antimicrobial therapy
BRDC Prevention
Vx for bacterial and viral resp pathogens, avoid co-mingling, reduce stress, adequate nutrition, air quality
PRDC Testing
Aerobic culture, PCR. important to look for all agents of PRDC in pneumonia work-up
PRDC Tx
Antimicrobial therapy
PRDC prevention
Vx for bacterial and viral pathogens, all-in/all-out production, avoid co-mingling, reduce stress, adequate nutrition, air quality
CIRDC/FRDC Testing
Aerobic culture, PCR. Important to look for all agents of CIRDC/FRDC in pneumonia work-ups
CIRDC/FRDC Tx
most are mild and do not need abx therapy. for pneumonia: tetracyclines, flouroquinolones, beta-lactams (not for mycoplasma!)
CIRDC/FRDC prevention
Vx for viral and bacterial diseases. Avoid co-mingling. Hygeine. Adequate Nutrition. Reduce stress. Air quiality.
Bordetella bronchiseptica:
component of
PRDC, CIRDC, FRDC
Bordetella bronchiseptica:
Gram + or Gram -
Gram -
Bordetella bronchiseptica:
shape
short rod
Bordetella bronchiseptica:
aerobe/anaerobe
obligate aerobe
Bordetella bronchiseptica:
intra/extracellular
extracellular
Actinobacillus pleuropneumoniae:
component of
PRDC
Actinobacillus pleuropneumoniae:
Gram + or Gram -
Gram -
Actinobacillus pleuropneumoniae:
shape
rod
Actinobacillus pleuropneumoniae:
aerobe/anaerobe
facultative anaerobe
Actinobacillus pleuropneumoniae:
intra/extracellular
extracellular
Equine Resp Disease components
Bacteria: streptococcus equi subsp. zooepidemicus, actinobacillus equuli. Viral: equine herpesvirus-1 or 4, equine influenza virus
Rhodococcus equi:
species/age
foals 1-6 mo (can cause abscesses in ruminants and pigs)
Rhodococcus equi:
Gram + or Gram -
Gram +
Rhodococcus equi:
shape
short rod to coccobacilli
Rhodococcus equi:
aerobe/anaerobe
obligate anaerobe
Rhodococcus equi:
intra/extracellular
facultative intracellular
Rhodococcus equi:
encounter
found in the soil and can be found on most farms. soil contaminate with horse or farm animal manure promotes growth
Rhodococcus equi:
entry
ingestion or inhalation
Rhodococcus equi:
Tx
foals with small lesions and no clinical signs may spontanously cure w/o Tx. Abx therapy. Supportive care
Rhodococcus equi:
prevention
No vx. Early detection of clinical infection. reduction of environmental load thru manure managment. decrease animal density.
Avibacterium paragallinarum:
component of
avian resp disease
Avibacterium paragallinarum:
causative agent of
infectious coryza
Avibacterium paragallinarum:
species/age
chickens of all ages, but susceptibilty increases with age
Avibacterium paragallinarum:
Gram + or Gram -
Gram -
Avibacterium paragallinarum:
shape
short rod
Avibacterium paragallinarum:
aerobe/anaerobe
facultative anaerobe
Avibacterium paragallinarum:
intra/extracellular
extracellular
Avibacterium paragallinarum:
testing
Aerobic culture (chocolate agar!), PCR
Avibacterium paragallinarum:
Tx
Antimicrobial Tx (tetracyclines, macrolides)
Avibacterium paragallinarum:
prevention
Vx, all-in/all-out, hygeine, stress reduction
Chlaymydia psittaci:
infectious form?
elementary body
Chlaymydia psittaci:
replicative form?
Reticulate body
Chlaymydia psittaci:
persistent form?
aberrant body
Chlaymydia psittaci:
causative agent of
psittacosis in humans
Chlaymydia psittaci:
species affected
wild and domestic avian species (but zoonotic!)
Chlaymydia psittaci:
Gram + or Gram -
Gram -
Chlaymydia psittaci:
shape
short rod to coccoid
Chlaymydia psittaci:
aerobe/anaerobe
facultative anaerobe
Chlaymydia psittaci:
intra/extracellular
obligate intracellular
Chlaymydia psittaci:
encounter
exogenous: subclinical carrier birds shed bacteria in resp secretions and feces
Chlaymydia psittaci:
entry
inhalation. can be ingested
Chlaymydia psittaci:
testing
PCR preferred
Chlaymydia psittaci:
Tx
antimicrobial therapy (tetracyclines)
Chlaymydia psittaci:
prevention
No Vx. All-in/All-out. Hygeine. Stress reduction.
Leptospira:
Gram + or Gram -
Gram -
Leptospira:
shape
spirochete (spiral shaped)
Leptospira:
aerobe/anaerobe
facultative anaerobe
Leptospira:
intra/extracellular
extracellular
Leptospira:
encounter
exogneous: contact with urine, contaminated soil, water/wet areas
Leptospira:
entry
penetration of damaged skin, penetration of mucous membranes, commonly oral conjunctival
Leptospira:
Testing
serology - but must know Vx status, microagglutation (MAT), SNAP, culture, PCR - recommended direct detection method.
Leptospira:
Tx
doxy, supportive care
Leptospira:
prevention
Vx!! avoidance of high risk enviros.
uncomplicated cystitis
AKA sporadic. generally occuring one or a few times over the lifetime of a healthy animal (1-2 times/year)
complicated cystitis
may happen 3+ times a year. known predisposing factors for bacterial infection.
dogs are more likely to have complicated/uncomplicated infections
uncomplicated
cats are more likely to have complicated/uncomplicated infections
complicated
cystitis encounter
endogenous: bacteria associated with cystitis are part of the lower urogenital and enteric flora
cystitis entry
ascending infection to the bladder
> 50% of UTIs in companion animals are from
E. coli (gram negative enteric)
Pyelonephritis
infection of the kidney. generally caused by the same bacteria associated with cystitis (E. coli!!)
Mycobacteria replication time
SLOW! 12 hours
Mycobacterium bovis is the causative agent of
bovine tuberculosis
Diagnosing bovine tuberculosis
caudal fold test
Mycobacterium lepraemurium is the causative agent of
canine and feline leprosy
mycobacterium smegmatis (soil saphrophytes): the causative agent of
ulcerative dermatitis
Mycobacterium aviam ssp. paratuberculosis: causative agent of
Johne’s Dz
Mycobacterium aviam ssp. paratuberculosis:
predisposition
young cattle
Mycobacterium aviam ssp. paratuberculosis: encounter
fecal-oral, infection in utero
Mycobacterium aviam ssp. paratuberculosis: diagnosis
Serology, PCR, Direct microscopy
Mycobacterium aviam ssp. paratuberculosis Vaccine negative effect:
will affect M. Bovis testing!
Mycoplamsa haemofelis encounter/entry
blood to blood contact: vector borne, animal fights, blood transfusion
non-hemotrophic mycoplasma encounter
host commensals
Most common age reange for Streptococcus suis infection in pigs?
3-12 weeks
Which is not a typical clinical sign of S. Suid infection in pigs?
A. fever
B. lameness
C. Neurologic signs
D. Diarrhea
D. Diarrhea
Which of the following is a rare, severe manifestation of streptococcus equi subsp equi infection?
A. Strangles
B. Bastard Strangles
C. Rhinitis
D. Pharyngitis
B. Bastard Strangles
Which member of the Pasteurellacea family causes Glassers disease in pigs?
A. Pasteurella multicoda
B. Mannheimina Haemolytica
C. Glasserella parasuis
D. Actinobacillus equuli
C. Glasserella parasuis
What is the causative agent of sleepy foal disease?
A. Streptococcus equi subsp. equi
B. Actinobacilllus equuli subsp. equuli
C. Rhodococcus equi
D. Klebsiella pneumoniae
B. Actinobacilllus equuli subsp. equuli
Which protein allows Listeria monocytogenes to pass from cell to cell, avoiding host immunity?
ActA
see chains of “boxcar” shaped organisms with pink capsule
Bacillus anthracis
which bacteria physically blocks the proventriculus of the rodent flea.
Y. pestis
which bacteria replicates in erythrocytes?
Anaplasma marginale
Which bacteria releases Leukotoxin?
What type of toxin is Leukotoxin? (endo/exo)
Mannheimia haemolytica
exotoxin
Which bacteria releases ApxI and ApxII (exotoxins)
Actinobacillus pleuropneumoniae
Rhodococcus equi
?? and the plasmid itself must be present for Dz to occur in foals
VapA