Final Flashcards
Definition of “sub-clinical”
Functional or anatomical abnormality detectable only with diagnositcs or indirect measures
Definition of “syndrome”
Set of signs or series of events occurring together often caused by single disease or condition (down cow syndrome)
Define “symptom”
Perceived by the patient
Define “sign”
Found by the examiner
Define “group syndrome”
Collection of diseases with common characteristics (lowered calf crop could be caused by lack of cyclicity)
Target vs action goal
Target: attainable goals in the production system (health, quality milk, reproduction)
Action: level when intervention must be taken by management
Qualities of ideal vaccine
Prolonged immunity Free of adverse side effects Inexpensive Stable Response distinguishable from natural infection
When NOT to vaccinate
First 3-5 days and first 3-5 weeks because of reduces immune response
Stress (within 1 week of castration, dehorning, weaning, and movement)
Lactation (4 weeks prior and 4-5 weeks post calving, bc immune suppression)
Advantages and disadvantages of modified live vaccine
Advantages: strong immunity, effective, less hypersensitivity
Disadvantages: mild reactions, abortion, reversion to virulence, limited shelf life
Advantages and disadvantages of killed vaccines
Advantages: unlikely to cause disease, stable storage
Disadvantages: short lived immunity, hypersensitivity, local reactions
Endotoxin load
Adults can get max of 3 gram negative antigens
Young can get max of 2 gram negative antigens
Vaccine program for dairies
Major viral diseases: BVDV (types 1 & 2), BHV-1, BRSV, PI3 5 primary Lepto serovars Major clostridial diseases Core endotoxin vaccines Brucellosis
What vaccines should incoming heifers get?
IBR/BVD/PI3/BSRV killed
Clostridium 7-way
E. Coli
Pinkeye
Why should you not vaccinate a bull for Brucella?
Will test positive and can lead to orchitis
What affects vaccine efficacy?
Type of vaccine
Route of administration
What is a classic sign of tetanus?
Third eyelid prolapse
What can be used to prevent tetanus?
Toxoid vaccine
Tetanus antitoxin for unvaccinated horses or neonates (foal w/o colostrum)
Encephalidities
EEE, WEE, VEE, WNV
Lifecycles include birds and mosquitoes
Humans and horses are dead end hosts
Mortality ranking of encephalidities
EEE>VEE>WEE>WNV
EEE
Sleeping sickness
Neuro signs (behavior change, low grade fever to high grade fever, dementia, seizures)
*In florida - booster EEE/WEE every 4-6 months
What is essential following infection with influenza?
Rest
EHV-1
Late term abortion
Vax does not prevent disease, but can minimize effects
EHV-4
Respiratory disease
Horses can be carriers and stress can cause recrudescence
Strangles
Lymph node enlargement
Highly contagious
Shedding of bacteria 1-2 days after onset of pyrexia
Nasal,pharyngeal culture is “gold standard” of diagnosis
When should mares be vaccinated for strangles?
30-60 days pre-foaling
Intranasal more effective but cannot cause colostral immunity
“Shaker foal syndrome”
Botulism
Vaccine available for type B
Potomac horse fever
Neorickettsia risticii
Fresh water snails
Equine viral arteritis
Abortion
Transmitted by respiratory and semen
Vaccine can interfere with semen so make sure to report negative status
Most common cause of infectious diarrhea in foals
Rotavirus
Equine Infections Anemia
Coggins test- AGID control program
1-2-3 rule
1 hour to stand
2 hours to nurse
3 hours to pass placenta
Umbilical care of foals
Dilute cholohex dip several times per day
Enema of foals
Given in first few hours, should not give more than 1
Colostrum for foals
Need 2L in first 24 hours (gut closure)
Measure IgG at 12-24 hours (<800 consider transfusion, <400 definite transfusion)
Barrow
Castrated male
Fat hog/finisher
Pig at finishing weight
All in/all out
All come in and leave at same time
Will not eliminate all respiratory disease
Make sure to clean between
Non-productive sow day
Not pregnant or lactating
SEW (segregated early weaning)
Take away from mom and raise elsewhere
To control disease
Market age and weight for pig
6 months (205 days) 230-280 lbs
Most common type of pig operation today
Breeding companies (genetic companies raise grandparent stock with good traits -> good parent stock -> terminal stock)
What are colored pig breeds good for?
Growth, lean muscle, size
What are white pig breeds known for?
Mothering
Maternal crosses
Yorkshire x Landrace
Chester White
What disease will still be present with specific pathogen free (SPF)?
Strep suis
What are antibiotics not used for anymore?
Gain/feed efficiency
Sulfa drug withdrawl times
Very long
What is one of the most important factors for a pig close to market?
Drug residues
Why are drugs often water soluble?
Pigs stop eating before stops drinking
Timeline for first 21 days of swine
Day 1-3: clip needle teeth, supplement iron, dip navel, dock tail, abx
Day 7: castrate, repeat C&D antitoxin, vaccinate (bordetella, pasturella, erysipelas) creep feed
Day 14-21: iron, wean vax (mycoplasma, PRRSV), parasite control, split weaning
What should you always vaccinate piglets for?
E. Coli
Erysipelas
Colibacillosis (E. Coli) in piglets
White scours
Milk cannot be absorbed
Profuse watery diarrhea, dehydration, death
Control by vaccinating sows
TGE
Morbidity 100%
Vomiting, diarrhea
Thin intestine wall on necropsy, no response to treatment
Treat with fluids and supportive care
What two diseases of piglets both have vomiting and diarrhea?
TGE
PED
What is worse - coronavirus or rotavirus?
Coronavirus
Cuts down villi more so takes longer to recover
PED (Porcine epidemic diarrhea virus)
Profuse watery diarrhea, vomiting
Supportive care
Coccidiosis in piglets
Sow is not the source (oocysts in piglet environment)
Diarrhea at 4-5 days
Clostridial enteritis in piglets
<7 days Clostridium perfringens type C 100% mortality Hemorrhagic small intestine (young pigs) Diphtheric membrane (old pigs)
Rotavirus in piglets
Only takes tips of villi
7-14days old
Vomiting (also diarrhea, anorexia)
Regeneration of villous tips 7-10days in young and 3-4days in older piglets
Timeline of when piglets get diseases
1-2 days: E Coli
4-5 days: Coccidiosis
<7 days: Clostridium
7-14 days: Rotavirus
What can happen with early weaning?
Navel sucking
Pasturella
Secondary inavder
Enteric diseases of weaned pigs
Colibacillosis Edema disease Salmonellosis Serpulina Hyodysenteriae (Brachyspira) PIA Gastric Ulcers
What causes post weaning diarrhea (PWD)?
Colibacillosis
What is edema disease caused by?
E. Coli
Within 10 days pigs are blind, dull, uncoordinated, death
What causes rectal strictures in pigs?
Salmonella
Septic form: cyanosis
Enteric form
“Button ulcers”
Porcine intestinal adenomatosis (PIA)
Aka ileitis
Necroproliferative enteritis
Proliferative hemorrhaic enteropathy (PHE)
Campylobacter or lawsonia
Very thickened ileum
Acute and chronic signs of gastric ulcers in pigs
Acute - hemorrhage and death
Chronic - anemia, weight loss
Always necropsy pigs if only sick for 1 day
Yep
Porcine respiratory disease complex (PRDC)
“18 week wall”
Necropsy everyone
Mycoplasma pneumonia
No mortality, just sick and coughing
Common
Mycoplasma hyopneumoniae
Swine flue
Bird transmission
Explosive outbreaks of coughing (100% morbidity) with high fever
Low mortality, typically resolve in 5-7 days
Pasturella multocida
Usually secondary, lives in resp tract of pigs
Sever dyspnea and open-mouth breathing
Actinobacillus pleuropneuoniae (APP)
aka hemophilus High mortality rate Respiratory infarcts Acute, subacute, and chronic signs Diagnose by CS, culture
Porcine reproductive respiratory syndrome (PRRS)
Mystery pig disease
Reproductive disorders and high piglet mortality
Acute is epizootic, chronic is endemic
Causes immunosuppression
Major intestinal parasites of adult horses
Small strongyles (most important to manage bc economic loss, significant resistance, live in cecum/colon walls for 4-6 weeks)
Large strongyles (migrate through abdominal tissues, moxidectin and fenbendazole used to treat, winter time)
Major intestinal parasites in young horses
Anoplocephala perfoliata (tapeworms, ileo-cecal valve, Praziquantel)
Ascarids (Parascaris equorum, live in SI but migrate through lungs, 75 days to produce eggs, resistance, always deworm at 60 days and then every 30-60d until 1 yo, cannot be diagnosed prior to 80days by fecal float)
Strongyloides westeri
Threadworms
Diarrhea in foals, no dz in mares
Infection spread via milk
Refugia
Wild type parasites that have not been subjected to anthelmintic pressures, lack resistance genes
When to treat strongyles based on fecal egg count
<200 epg: dont treat
200-500 epg: may treat
>500 epg: treat
Deworming based on climate
South: dont deworm in summer
North: dont deworm in winter
5 C’s of dairy calf raising
Colostrum Cleanliness Comfort Calories Consistency
When do most dairy calves die?
2-14 days
Two determinants of success of colostrum
Time
Mass of Ig
Goal for growth rate for one month old calves
1.8lb/day
When to dehorn calves
1 month old
Vaccines of one month old calf
Clostridium, IBR/PI3/BVD/BRSV
What is the first and most important line of defense against bacteria in mammary gland?
Teat cannal
Peracute mastitis
Most sever form
Subacute mastitis
Most common clinical form
Subclinical mastitis
Most common form
Primary udder pathogens
Staph aureus
Strep agalactia
Mycoplasma
Strep dysgalactia
Environmental pathogens for udder
Staph uberis
Strep dysgalactia
Treatment of Strep agalactiae
BLITZ TREATMENT: Treatment of all positive quarters
Staph aureus
Contagious mastitis
No response to penicillin
Mycoplasma (mastitis)
Contagious
“Coffee grounds” milk
Mostly respiratory pathogen
95% rule for mastitis
95% of mastitis due to strep ag, dysgalatia, uberis, staph aureus, coliforms
Goal for percentage of cows with clinical mastitis per month
<3%
What will not differentiate between sick individual or herd?
Somatic cell counts of bulk tank
Important steps of proper milking
Clean and dry teats
Dip all teats post milking
Dry Cow therapy
All functional quarters of all cows should be treated with long-acting intramammary abx at time of drying off
What is an acceptable form of treatment for mastitis?
Culling :(
Emergency preparation for beef cattle
Assess problem potentials
Client education
Have supplies/drugs available
Establish protocols
Fed beef vs non-fed beef
Fed beef: born and raised for the intention of becoming quality meat
Non-fed beef: cows that were used for other purpose and then become hamburger
Most preferred route of drug administration for beef cows
SQ
Beef production phases
Cow-calf phase
Stocker-grower phase
Finishing phase
What is an ideal calving interval?
365 days
Calves devoid of active immunity until what?
Passive transfer of immunoglobulins from colostrum
Strategy for control of parasites (beef cattle)
Minimize pasture contamination
Balance stocking rates
Rotate pastures
Using TP, whats the cut off to be considered passive transfer?
5.5g/L or better