Salmonella Flashcards
What subspecies of Salmonella are of Veterinary importance?
Subspecies enterica
What are the host specific virulence species for salmonella?
(typhoid) serotypes
Eg. S. typhi; S. Gallinarum
What are the host adapted/restricted serotypes for salmonella?
S. Dublin- bovine
S. typhimurium var. Copenhagen: pigeon
What are the non host specific serotypes for salmonella?
Most serotypes
Typhimurium, enteridits, virchow, agona, paratyphi B
How is Salmonella in the environment?
Quite resistant- esp when protected by organic material (shit) and in dust or feed.
Which serotypes are zoonotic in regards to salmonella?
Non host specific, some host adapted/restriced
Where are you going to find salmonella? extracellular/ intracellular?
Facultative intracellular
what are the main serotypes of salmonella in bovine?
S. typhimurium and dublin
what are the symptoms of Salmonella typhimurium?
***Diarrhea (illeum + large intestine)
General symptoms
abortion
Udder (tissue localization).
Salmonella dublin, Calfs symptoms?
(diarrhea) general symptoms Tissue localization -lung -liver -spleen
Salmonella dublin, Adult cattle symptoms
Diarrhea
Organ dependent symptoms
-abortion
-subclinical mastitis (persisting intracellular)
Salmonella Dx Bovine?
Live animals Fecal material Milk-mastitis Respiratory: BAL Arthritis: puncture Abortion: fetus, placenta, vagina
Dead animals
- ileum
- different organs
Tx of Salmonella in bovine?
Isolation
Fluids
Antimicrobials
NSAIDs
Host specific serotype of salmonella and pigs?
S. Choleraesuis: typhoid
Non host specific Salmonella in pigs symptoms?
Clinical symptoms in animals >50kg, most freq subclinical
Diarrhea
Slow spread
Hyperacute form (>70-80kg)- ACUTE MORTALITY
Acute form freq + cyanosis
Chronic form: Non specific, lesser growth
What are the zoonotic species of salmonella?
S. Typhimurium
S. Derby
Dx of salmonella and pigs?
Culture
Elisa (Antigen)
Elisa (antibodies) difficult to interpret
-used sometime in control programs
Tx of salmonella in pigs?
nothing cool
antimicrobials
general support (nsaids)
Prevention of Salmonella in pigs?
All in all out system
clean + disinfect
Organic acids- drinking water and feed
Feed composition
Salmonella in horses species and pathogenesis?
Salmonella Abortus-equi
-pathogenesis depends on uptake
Dx of salmonella in horses
bactiology tests
Tx of Salmonella in horses?
Antimicrobials
Elimination from repro organs is difficult due to bacteria being intracellular
What is the incubation period of mastitis in horses considered?
Short- hours to 6 days
Mild Symptoms of salmonella in horses?
General - fever anorexia depression
Slight diarrhea
Dx difficult (isolation from feces difficult)
Self-limiting
Acute symptoms of salmonella in horses?
Fever, anorexia, mild colic, 24h: Diarrhea Severe symptoms + cyanosis Shock possible Laminitis Slow recovery and relapse possible Can evolve to Chronic -dec weight -Intermittent diarrhea + anorexia + fever
Hyperacute salmonella in horses?
Foal Sever general symptoms Eventually diarrhea Endotoxic shock 24-72h--> Death Tissue localization -foal -depends on organ effected -Freq arthritis
Dx of Salmonella in horses?
Neutropenia
Culture
Tx of salmonella in horses?
Fluids IV
NSAIDS
Antimicrobials
Tx carriers as well!
prevention of Salmonella in horses?
Hygiene
Salmonella in dogs and cats is usually non host specific T/F?
True
Symptoms of salmonella in dogs and cats?
Enteritis and septicemia
What percent of dogs and cats are carriers for Salmonella?
D 0-36%
C 0-20%
What is the origin of salmonella infection in dogs and cats?
Feed
Dx of Salmonella in Dogs and Cats?
Culture
Elisa
PCR
Tx of Salmonella in dogs and Cats?
Fluids
Antibiotics- exception: contraindicated in animals with a good general condition= creation of carriers
Salmonella Paratyphus?
Pigeon salmonella
Species of salmonella in pigeons?
S. Typhimurium var. Copenhagen specific clonal lineage Not zoonotic Carriers are the cause of spread Systemic disease + diarrhea
when does acute paratyphus occur?
Mainly during breeding season
Chronic paratyphus is associated with?
One wing hanging down (tissue localization)
Intermittent excretion
Flock symptoms of paratyphus?
Anorexia Weight Diarrhea Limping Unable to fly Breeding difficulties Apathic PU/PD Mortality
Dx of Paratyphus?
Culture
Rapid slide agglutination for antibodies
Tx of paratyphus?
Antimicrobials
Immune therapy: inactivated vaccine
-not to prevent infection; rather to reduce severity of dz
Hygiene
Salmonella in psittaciformes?
Very rare
Salmonella in passeriformes?
S. Typhimurium (other clone than columbiformes)
- birdhouses
- -stress
- -overcrowding
- cold + humid
- inappropriate feed
Symptoms of salmonella in passeriformes?
apathic
Dec feed and water intake
Chronic
Diarrhea
Salmonella in poultry: Typhoid or paratyphoid like?
S. pullorum
S. gallinarum
Non- Typhoid salmonella in poultry?
S. enteridits other: -typhimurium -virchow -paratyphi B -Infatis -agona -NEWPORT-US-***
S. pullorum/gallinarum are antigenically the same? T/F
True
also similar to S. enteriditis (vaccination for SE will give false positives in serology)
how is S. pullorum/ gallinarum differentiated?
PCR
REPORTABLE DZ
Official elimination programs (now rare Dz in Europe and North America)
Salmonella in turkeys?
S. enterica ssp arizonae
S. pullorum is going to affect who at what age?
Pullorum Dz
Chicken, Turkey, Pheasent
S. pullorum in Adults?
oophoritis w/ deformed yellow-greenish follicles
Typhoid salmonella in poultry Dx and Tx?
Culture
Serology: Slide agglutination
-cross reactivity w/ SE vaccination
False positives due to Strep Lancefield D
Tx
only for hobby poultry: antibiotics but no elimination (intracellular)
REPORTABLE!
S. Gallinarum: fowl typhoid information?
Chickens, Ducks, pheasant, quail, partridges, turkeys
Serological Cross rxn w/ S. pullorum
- *Older animals
- **REPORTABLE*
symptoms of S. Gallinarum?
Hyper acute mortality + hemolytic anemia (endotoxins)
Acute and subacute; increasing mortality up to 30%- general symptoms
Turkey salmonella?
S. enterica ssp arizonae
Turkey salmonella age and geographical location?
Only younger animals
United States
Dx & Tx of Turkey salmonella S. enterica ssp arizonae?
Culture
Tx- eradication
Control by serology (slide agglutination): difficult
different serotypes
false negatives
S. enteriditis important information?
ZOONOTIC (egg contamination) raw undercooked eggs- COOKIE DOUGH!
Dz Decreased greatly due to vaccine
Eggs from positive flocks must be heated.
Breeding animals in the EU must be free from what species of salmonella?
Enteriditis Typhimurium virchow hadar infantis paratyphi B var. Java
Salmonella in broiler chicken percentage?
30% positive
Slaughter salmonella percentage?
up to 80% - US decontamination of carcasses w/ bleach (not allowed in EU)