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UNDERSTANDING FOOT AND MOUTH DISEASE INFECTION by Cleon V. Kimberling Extension Veterinarian Colorado State University PowerPoint Presentation
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UNDERSTANDING FOOT AND MOUTH DISEASE INFECTION by Cleon V. Kimberling Extension Veterinarian Colorado State University - PowerPoint PPT Presentation


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UNDERSTANDING FOOT AND MOUTH DISEASE INFECTION by Cleon V. Kimberling Extension Veterinarian Colorado State University. FOR AN INFECTION TO OCCUR THERE IS A CHAIN OF EVENTS. HOST. AGENT. MODE OF ESCAPE. MODE OF TRANSMISSION. MODE OF ENTRY. SUSCEPTIBLE HOST. HOSTS. CATTLE. SWINE.

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slide1

UNDERSTANDING FOOT

AND

MOUTH DISEASE INFECTION

by

Cleon V. Kimberling

Extension Veterinarian

Colorado State University

slide2

FOR AN INFECTION TO OCCUR

THERE IS A CHAIN OF EVENTS

  • HOST
  • AGENT
  • MODE OF ESCAPE
  • MODE OF TRANSMISSION
  • MODE OF ENTRY
  • SUSCEPTIBLEHOST
slide3

HOSTS

  • CATTLE
  • SWINE
  • SHEEP & GOATS
  • ALL CLOVEN HOOFED
  • ANIMALS.
  • CAMELIDS ARE NOT HIGHLY
  • SUSCEPTIBLE
slide4

RESISTANT SPECIES

  • HORSES
  • MAN
  • FOOT AND MOUTH DISEASE
  • IS NOT A HUMAN HEALTH
  • HAZARD
slide5

AGENT (FMD VIRUS)

  • VIRUS
  • EXTREMELY SMALL
  • EXTREMELY HARDY
  • NOT KILLED BY NORMAL
  • PASTEURIZATION
  • LIVES FOR MONTHS IN
  • MEAT & MILK PRODUCTS
slide6

AGENT (FMD VIRUS)

  • RESISTANT TO MANY
  • COMMON DISINFECTANTS
  • A LOW OR HIGH PH
  • KILLS THE VIRUS
  • VINEGAR – CLOROX
  • LYE (NaOH)
slide7

AGENT (FMD VIRUS)

  • SURVIVES FOR WEEKS OR
  • MONTHS IN DRIED
  • SECRETIONS
  • SURVIVES LONG PERIODS
  • IN COOL DAMP CLIMATES
slide8

AGENT (FMD VIRUS)

  • HIGHLY CONTAGIOUS
  • IT TAKES VERY FEW
  • VIRUS PARTICALS TO
  • CAUSE AN INFECTION
  • A PIECE OF INFECTED
  • MATERIAL THE SIZE
  • OF A QUARTER WILL INFECT
  • 1,000,000 HEAD OF CATTLE
slide9

HOW DOES THE VIRUS ESCAPE

FROM THE ANIMAL?

  • IN RUPTURED VESCICLE FLUID
  • EXHALED AIR
  • SALIVA
  • MILK
  • SEMEN
  • FECES
  • URINE
slide10

TRANSMISSION

  • THE VIRUS IS SHED 5-10
  • BEFORE CLINICAL SIGNS
  • APPEAR
  • VACCINATED ANIMALS CAN
  • SHED THE ORGANISM
  • RECOVERED CATTLE, SHEEP
  • AND BUFFALO CAN BECOME
  • CARRIERS
slide11

FMD VIRUS SURVIVES

  • UP TO 3 DAYS IN MUSCLE
  • FOR MONTHS IN CHILLED OR
  • FROZEN LYMPH NODES, BONE
  • MARROW, VISCERA AND
  • RESIDUAL BLOOD CLOTS
slide12

SOME PLACES WHERE

THE VIRUS HIDES OUT

  • SAUSAGE/HAM/BACON
  • 190 DAYS
  • DRIED SKIM MILK 2 YEARS
  • CURED HIDES 352 DAYS
  • SURVIVAL OF THE FMD
  • VIRUS DEPENDS ON pH,
  • TEMPERATURE & HUMIDITY
slide13

MODES OF TRANSMISSION

  • DIRECT CONTACT &
  • RESPIRATORY AEROSOLS
  • LIVE ANIMAL MOVEMENT
  • ARTIFICIAL BREEDING
  • WINDBORNE SPREAD
  • PIG EMIT 1,000,000,000 I U /DAY
slide14

TRANSMISSION

  • ANIMAL PRODUCTS &
  • BY-PRODUCTS
  • VECTORS
  • MECHANICAL SPREAD/FOMITES
slide15

MODE OF ENTRY

  • INGESTION
  • INHALATION
  • ARTIFICIAL INSEMENATION
slide16

SUSCEPTIBILITY OF

A NEW HOST

  • PIGS, CATTLE, SHEEP, GOATS
  • AND WILD ANIMALS
slide17

WHERE DO WE BREAK

THE CHAIN?

  • PREVENT ENTRY OF THE VIRUS
  • ALTER THE SUSCEPTIBILITY
  • OF THE HOST BY VACCINATION
slide18

DISEASES THAT CAUSE

BLISTERS AND SIMILAR

SIGNS

  • VESICULAR STOMATITIS
slide19

IF YOU HAVE AN ANIMAL

WITH MOUTH, FEET OR

TEAT LESIONS CALL YOUR

VETERINARIAN

slide20

HOW DO WE HANDLE

A SUSPECTED CASE?

  • IMMEDIATE PREMISE
  • AND 1 MILE QUARANTINE
slide21

HOW DO WE DEAL WITH

A FMD OUTBREAK?

  • QUARANTINE AND CULLING
  • OF ANIMALS
  • VACCINATION AND CULLING
slide22

WHO IS IN CHARGE?

  • WHO PAYS THE BILL?
  • WHAT ARE THE IMPACTS?
slide23

WHERE DO I GET ADDITIONAL

INFORMATION?

www.footandmouth.colostate.edu

www.maff.gov.uk/animalh/diseases/fmd/default.html

www.guardian.co.uk/gallery/0,2759,180825,00.html