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Haidee E. Torio
VEPI 222 (Veterinary Surveillance)
July 15 , 2015
SURVEILLANCE
Dr. Haidee E. Torio
24 May 2016
Surveillance
• the systematic ongoing collection,
collation, and analysis of
information related to animal
health and the timely
dissemination of information to
those who need to know so that
action can be taken.
The World Organisation for Animal Health (OIE)
Monitoring
• All activities aimed at
detecting changes in
the epidemiological
parameters of a
specified disease.
Purposes of Animal Health
Surveillance
Early detection of
disease and early
response
1
Main purpose:
Source: Angus, 2012
Characteristics
of Surveillance
systems
C.S.R.Continuous Systematic Relevant
Characteristic: Continuous
• Able to establish disease or
productivity patterns.
• Operational even in the
absence of the office head
• Supported by existing
resources, manpower,
stakeholders, administrative
orders and legislations
Characteristic: Systematic
• It is guided by accepted
standards (qualitative and
quantitative)
• The flow of information
follows a stable cycle or
direction
• A sample flow of information
is shown below:
Source: FAO Manual on Livestock Disease
Surveillance and Information Systems
PhilAHIS
OIE
Regional
Characteristic: Relevant
• Relevant to national or global
concerns
• Relevant to the public health
concerns
• Relevant to the livestock
industry concerns
OIE’S LIST OF DISEASES
In 2012 : 90 diseases
25 multiple species,
14 cattle,
11 sheep/goat,
11 equine,
7 swine,
12 avian,
2 lagomorph,
6 bee,
2 others
In 2012 : 26 diseases
9 fish,
7 molluscs,
8 crustaceans,
2 amphibians
Source: Dr. R. Abila, OIE
Multiple Species
Anthrax
Infection with Aujeszky's disease virus
Bluetongue
Echinococcosis/hydatidosis
Foot and mouth disease
Heartwater
Japanese encephalitis
New world screwworm (Cochliomyia hominivorax) and Old world screwworm
(Chrysomya bezziana)
Paratuberculosis
Infection with rabies virus
Rift Valley fever
Rinderpest
Trichinellosis (Trichinella spiralis)
Tularemia
Vesicular stomatitis West Nile Fever
Bovine
Bovine anaplasmosis
Bovine babesiosis
Bovine brucellosis
Bovine genital campylobacteriosis
Bovine spongiform encephalopathy
Bovine tuberculosis
Bovine tuberculosis of farmed cervidae
Contagious bovine pleuropneumonia
Enzootic bovine leukosis
Haemorrhagic septicaemia (Pasteurella multocida serotypes 6:b and 6:e)
Infectious bovine rhinotracheitis/ infectious pustular vulvovaginitis
Lumpy skin disease (caused by group III virus, type Neethling)
Theileriosis
Trichomonosis
Source: Dr. R. Abila, OIE
Sheep and Goat
Caprine and ovine brucellosis (excluding Brucella ovis)
Caprine arthritis/encephalitis
Contagious agalactia
Contagious caprine pleuropneumonia
Chlamydophila abortus infection (Enzootic abortion of ewes, ovine
chlamydiosis)
Maedi-visna
Ovine epididymitis (Brucella ovis)
Peste des petits ruminants
Scrapie
Sheep pox and goat pox
Source: Dr. R. Abila, OIE
Swine
African swine fever
Classical swine fever
Porcine brucellosis
Swine vesicular disease
Transmissible gastroenteritis
Source: Dr. R. Abila, OIE
Equine
Infection with African horse sickness virus
Contagious equine metritis
Dourine
Equine encephalomyelitis (Eastern and Western)
Equine infectious anaemia
Infection with equine influenza virus
Equine piroplasmosis
Equine rhinopneumonitis
Infection with equine arteritis virus
Glanders
Venezuelan equine encephalomyelitis
Source: Dr. R. Abila, OIE
Avian
Avian chlamydiosis
Avian infectious bronchitis
Avian infectious laryngotracheitis
Infection with viruses of notifiable avian influenza
Avian mycoplasmosis (Mycoplasma gallisepticum)
Duck virus hepatitis
Fowl typhoid and pullorum disease
Infectious bursal disease (Gumboro disease)
Newcastle disease
Source: Dr. R. Abila, OIE
Lagomorph
Myxomatosis
Rabbit haemorrhagic disease
Source: Dr. R. Abila, OIE
Apidae
Acarapisosis of honey bees
American foulbrood of honey bees
European foulbrood of honey bees
Small hive beetle infestation (Aethina tumida)
Tropilaelapsinfestation of honey bees
Varroosis of honey bees
Source: Dr. R. Abila, OIE
General Categories of Surveillance
Systems
•Passive
•Active
Passive
• Provider-initiated.
• Example- the livestock
owners submitting reports to
veterinary authorities to seek
technical advice on farm
animal problems.
Passive
It cannot…
1.describe a good disease
epidemiology
2.quantify disease importance
3.prove disease freedom
4.Identify priority disease control
programs
Limitations
Active
Surveillance System
• Health Department-initiated.
• Example- the Office of the Provincial Veterinarian
conducting a study to detect the
presence/absence of bird flu in his area of
jurisdiction.
Active
• Eliminates under-reporting
• Representative data
• Rates and proportions can be
calculated.
• Quick to conduct
• Relatively inexpensive
Advantages
Scope of Surveillance Systems
• General
• Targeted
General surveillance
• Collection of data
about several
diseases.
• Preferred by
Veterinary authorities
• Multiple diseases
Targeted
surveillance
• This system focuses on a
specific disease of interest.
• Preferred by farm owners
Surveillance Activities
Structured serological survey
Structured survey of veterinary
practitioners
to ask about the most common
diseases
they encounter
Use of dairy factory bulk milk
cell-count data to
assess the progress of mastitis
control programs
Farmer reporting systems
Types of Data
utilized by
surveillance
systems
1. Recorded Diagnoses
• Made by
veterinarians or by
experts from animal
disease diagnostic
laboratories.
2. Clinical signs or Syndromes-
• applicable to areas with no access to
laboratories for disease confirmation
• or to non-veterinarians (such as pet
owners, animal health workers or livestock
technicians).
• Syndrome= collection of signs
associated to a particular
disease.
• Both reporting of signs and reporting of
syndromes are referred to as syndromic
surveillance:
3. Survey Reports to demonstrate
freedom from disease.
• Usually for international
trading of livestock and meat
products
• Philippines- FMD or Avian Flu
4. Indirect indicators
• Average milk yield, average animal weight at
market age, etc.
• In some countries, some laboratories
measure the parasite egg count in pasture
areas.
• Locally, sales of specific drugs or animal
feeds.
5. Risk factors
• Rainfall, humidity, temperatures
are examples of data that can
be gathered from local weather
stations.
• Animal density per farm
• Human movement
• Presence of vectors, etc
Possible Data Sources for Surveillance
1. On-farm
2. Veterinary diagnostic laboratories
3. Slaughter/abattoirs
4. Livestock auction markets
5. Renderers
6. Feral/wild species
7. Ports/borders
Types of
surveillance
systems in public
and animal health
Farmer-based Facility-based Sentinel Syndromic Survey
FARMER- BASED REPORTING
• the farmer identifies that they
have sick animals and contacts
a veterinarian for help
• most common form
• can be used to identify a wide
range of diseases
Advantages
Very good
population
coverage
Most animals
are seen by
their owners
frequently
Inexpensive
Discovery of
new diseases
FACILITY-BASED REPORTING SYSTEM
• inexpensive
• can cover a very large number of animals
• allows collection of diagnostic specimens
• provides a relatively constant supply of
surveillance data
• enables data to be collected from a small
number of abattoirs that slaughter
animals from a large number of farms
SENTINEL SURVEILLANCE
• A sentinel is one who stands guard to warn
when something happens.
• Sentinel herds act as indicators for the rest
of the population to warn that disease is
present
• expensive
• the number of herds and the number of animals per herd
is relatively small --> low population coverage.
• not particularly useful as early warning systems for
diseases that are primarily spread through animal
movement of fomites.
Common problems
Surveys
 a form of active surveillance
 the veterinary services have full
control over the design of the survey
and the data collected
Key advantage:
• Sampling strategy can be developed to
exactly meet the needs of veterinary
services and decision makers
SYNDROMIC SURVEILLANCE
• Concerned with signs and group of signs that are
associated with disease
• It involves:
– Identification of signs/syndromes
– Analysis of the patterns of these signs in
space and time
• In order to detect changes, large
amounts of data are required
Type of surveillance for
different objectives
Acknowledgement
Dr. Ronnie D. Domingo
Surveillance

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Surveillance

  • 1. Haidee E. Torio VEPI 222 (Veterinary Surveillance) July 15 , 2015 SURVEILLANCE Dr. Haidee E. Torio 24 May 2016
  • 2. Surveillance • the systematic ongoing collection, collation, and analysis of information related to animal health and the timely dissemination of information to those who need to know so that action can be taken. The World Organisation for Animal Health (OIE)
  • 3. Monitoring • All activities aimed at detecting changes in the epidemiological parameters of a specified disease.
  • 4. Purposes of Animal Health Surveillance Early detection of disease and early response 1 Main purpose:
  • 8. Characteristic: Continuous • Able to establish disease or productivity patterns. • Operational even in the absence of the office head • Supported by existing resources, manpower, stakeholders, administrative orders and legislations
  • 9. Characteristic: Systematic • It is guided by accepted standards (qualitative and quantitative) • The flow of information follows a stable cycle or direction • A sample flow of information is shown below:
  • 10. Source: FAO Manual on Livestock Disease Surveillance and Information Systems
  • 12. Characteristic: Relevant • Relevant to national or global concerns • Relevant to the public health concerns • Relevant to the livestock industry concerns
  • 13. OIE’S LIST OF DISEASES In 2012 : 90 diseases 25 multiple species, 14 cattle, 11 sheep/goat, 11 equine, 7 swine, 12 avian, 2 lagomorph, 6 bee, 2 others In 2012 : 26 diseases 9 fish, 7 molluscs, 8 crustaceans, 2 amphibians Source: Dr. R. Abila, OIE
  • 14. Multiple Species Anthrax Infection with Aujeszky's disease virus Bluetongue Echinococcosis/hydatidosis Foot and mouth disease Heartwater Japanese encephalitis New world screwworm (Cochliomyia hominivorax) and Old world screwworm (Chrysomya bezziana) Paratuberculosis Infection with rabies virus Rift Valley fever Rinderpest Trichinellosis (Trichinella spiralis) Tularemia Vesicular stomatitis West Nile Fever
  • 15. Bovine Bovine anaplasmosis Bovine babesiosis Bovine brucellosis Bovine genital campylobacteriosis Bovine spongiform encephalopathy Bovine tuberculosis Bovine tuberculosis of farmed cervidae Contagious bovine pleuropneumonia Enzootic bovine leukosis Haemorrhagic septicaemia (Pasteurella multocida serotypes 6:b and 6:e) Infectious bovine rhinotracheitis/ infectious pustular vulvovaginitis Lumpy skin disease (caused by group III virus, type Neethling) Theileriosis Trichomonosis Source: Dr. R. Abila, OIE
  • 16. Sheep and Goat Caprine and ovine brucellosis (excluding Brucella ovis) Caprine arthritis/encephalitis Contagious agalactia Contagious caprine pleuropneumonia Chlamydophila abortus infection (Enzootic abortion of ewes, ovine chlamydiosis) Maedi-visna Ovine epididymitis (Brucella ovis) Peste des petits ruminants Scrapie Sheep pox and goat pox Source: Dr. R. Abila, OIE
  • 17. Swine African swine fever Classical swine fever Porcine brucellosis Swine vesicular disease Transmissible gastroenteritis Source: Dr. R. Abila, OIE
  • 18. Equine Infection with African horse sickness virus Contagious equine metritis Dourine Equine encephalomyelitis (Eastern and Western) Equine infectious anaemia Infection with equine influenza virus Equine piroplasmosis Equine rhinopneumonitis Infection with equine arteritis virus Glanders Venezuelan equine encephalomyelitis Source: Dr. R. Abila, OIE
  • 19. Avian Avian chlamydiosis Avian infectious bronchitis Avian infectious laryngotracheitis Infection with viruses of notifiable avian influenza Avian mycoplasmosis (Mycoplasma gallisepticum) Duck virus hepatitis Fowl typhoid and pullorum disease Infectious bursal disease (Gumboro disease) Newcastle disease Source: Dr. R. Abila, OIE
  • 21. Apidae Acarapisosis of honey bees American foulbrood of honey bees European foulbrood of honey bees Small hive beetle infestation (Aethina tumida) Tropilaelapsinfestation of honey bees Varroosis of honey bees Source: Dr. R. Abila, OIE
  • 22. General Categories of Surveillance Systems •Passive •Active
  • 23. Passive • Provider-initiated. • Example- the livestock owners submitting reports to veterinary authorities to seek technical advice on farm animal problems.
  • 24. Passive It cannot… 1.describe a good disease epidemiology 2.quantify disease importance 3.prove disease freedom 4.Identify priority disease control programs Limitations
  • 25. Active Surveillance System • Health Department-initiated. • Example- the Office of the Provincial Veterinarian conducting a study to detect the presence/absence of bird flu in his area of jurisdiction.
  • 26. Active • Eliminates under-reporting • Representative data • Rates and proportions can be calculated. • Quick to conduct • Relatively inexpensive Advantages
  • 27. Scope of Surveillance Systems • General • Targeted
  • 28. General surveillance • Collection of data about several diseases. • Preferred by Veterinary authorities • Multiple diseases
  • 29. Targeted surveillance • This system focuses on a specific disease of interest. • Preferred by farm owners
  • 30. Surveillance Activities Structured serological survey Structured survey of veterinary practitioners to ask about the most common diseases they encounter Use of dairy factory bulk milk cell-count data to assess the progress of mastitis control programs Farmer reporting systems
  • 31. Types of Data utilized by surveillance systems
  • 32. 1. Recorded Diagnoses • Made by veterinarians or by experts from animal disease diagnostic laboratories.
  • 33. 2. Clinical signs or Syndromes- • applicable to areas with no access to laboratories for disease confirmation • or to non-veterinarians (such as pet owners, animal health workers or livestock technicians). • Syndrome= collection of signs associated to a particular disease. • Both reporting of signs and reporting of syndromes are referred to as syndromic surveillance:
  • 34. 3. Survey Reports to demonstrate freedom from disease. • Usually for international trading of livestock and meat products • Philippines- FMD or Avian Flu
  • 35. 4. Indirect indicators • Average milk yield, average animal weight at market age, etc. • In some countries, some laboratories measure the parasite egg count in pasture areas. • Locally, sales of specific drugs or animal feeds.
  • 36. 5. Risk factors • Rainfall, humidity, temperatures are examples of data that can be gathered from local weather stations. • Animal density per farm • Human movement • Presence of vectors, etc
  • 37. Possible Data Sources for Surveillance 1. On-farm 2. Veterinary diagnostic laboratories 3. Slaughter/abattoirs 4. Livestock auction markets 5. Renderers 6. Feral/wild species 7. Ports/borders
  • 38. Types of surveillance systems in public and animal health Farmer-based Facility-based Sentinel Syndromic Survey
  • 39. FARMER- BASED REPORTING • the farmer identifies that they have sick animals and contacts a veterinarian for help • most common form • can be used to identify a wide range of diseases
  • 40. Advantages Very good population coverage Most animals are seen by their owners frequently Inexpensive Discovery of new diseases
  • 41. FACILITY-BASED REPORTING SYSTEM • inexpensive • can cover a very large number of animals • allows collection of diagnostic specimens • provides a relatively constant supply of surveillance data • enables data to be collected from a small number of abattoirs that slaughter animals from a large number of farms
  • 42. SENTINEL SURVEILLANCE • A sentinel is one who stands guard to warn when something happens. • Sentinel herds act as indicators for the rest of the population to warn that disease is present
  • 43. • expensive • the number of herds and the number of animals per herd is relatively small --> low population coverage. • not particularly useful as early warning systems for diseases that are primarily spread through animal movement of fomites. Common problems
  • 44. Surveys  a form of active surveillance  the veterinary services have full control over the design of the survey and the data collected Key advantage: • Sampling strategy can be developed to exactly meet the needs of veterinary services and decision makers
  • 45. SYNDROMIC SURVEILLANCE • Concerned with signs and group of signs that are associated with disease • It involves: – Identification of signs/syndromes – Analysis of the patterns of these signs in space and time • In order to detect changes, large amounts of data are required
  • 46. Type of surveillance for different objectives
  • 47.
  • 48.
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