Dr. Porter- Bacterial Dzs (LS) Flashcards
Why was the National Poultry Improvement Plan (NPIP) established?
What do NPIP do?
(TQ)
- To control transimssion of Salmonella pullorum
- Monitors egg-transimtted infections
What dz does Salmonella pullorum cause?
2
Pullorum Dz
Bacillary White Diarrhea
Which 2 poultry species are relatively resistant to Samonella pullorum?
Ducks
Geese
Agents that are monitored for by the NPIP?
- Salmonella pullorum-gallinarum
- Mycoplasma gallisepticum
- M. synoviae
- M. meleagridis
- Avian Influenza
What is a hallmark of Salmonella P-G infection?
Peak mortality?
- Yellow-red inflammtory exudate in the cecum → “cecal cores”
- @ 2-3 wks of age (young birds)
Lesions of Salmonella P-G?
- Sudden death→ granulomatous nodules in heart
- White foci → heart, liver, cecum, gizzard
- Cecal cores
- Septic arthritis
- dehydration
- Spelnomegaly
- Few signs in adults
- Poor growth
If you have Fibronecrotic typhlitis (Cecal cores) what are your 2 top Rule Outs?
Samonella or Coccidial dz.
What is used to screen for Samonella P-G?
Is it diganostic?
S. pullorum Plate Agglutination Test
NO!
What are done with “Reactor” birds who test (+) for S. pullorum?
Culled
How can you distinguish Paratyhpoid Salmonella from Salmonella P-G?
Flagella!
Lesions of Paratyphoid salmonella?
4
- Enteritis
- Typhlitis (cecum)
- Yolk sac infection (Omphalitis)
- Peritonitis
Salmonella arizona is an example of what?
How is it spread?
- paratyphoid Salmonella
- contaminated egg shells, dirty hatchery, rodents
Salmonella arizona is a problem for what sector?
Turkeys
(poults < 3 wks of age)
Lesions of Salmonella arizona?
- Hypopyon→blindness
- Fibronous peritonitis
- Suppurative meningitits → neuro signs
Which form of Salmonella can be transfered transovarian?
S. enteritidis
Which form of Salmonella comes from soiled eggs?
S. typhimurium
5 ways birds get Salmonella?
- contaminated by-products in feed
- feces of carriers
- hatchery contamination
- vectors → mice & wild birds
- Egg transmission
What is the most common bacterical infection in US poultry?
E. coli → Colibacillosis
4 E. coli Serotypes of concern?
- 01
- 02
- 035
- 078
What most often predisposes birds to E. coli infections?
Stress!
Traid seen in Classical, Acute form of Colibacillosis?
- Fibronous pericarditis
- Airsacculitits
- Perihepatits
Which sex has a higher incidence of E. coli Cellulitits?
Male broilers
What bacT can cause Salpingitis?
- E. coli→ Colibacillosis
How can you reduce E. coli Cellulitis?
Eliminate
- crowding
- piling of birds
- bright lights
- poor litter
How does Staph. aureus get into a bird?
skin injury/excessive moisture→ Staph penetrates & replicates locally → moves to bloodstream → sepis/bacteremia (liver, spleen, bone, skin)
