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OS18 GLOBAL VACCINE SECURITY
H.S. Frenkel and J.G van Bekkum
how they improved vaccine
availability and quality
OS18 GLOBAL VACCINE SECURITY
FMDV was a huge challenge
• Before 1950 only
Waldman vaccine
• Huge number of cattle
needed production
• No containment
OS18 GLOBAL VACCINE SECURITY
Herman Salomon Frenkel (1891 – 1968)
• 1930 appointed direct
of the state veterinary
institute
• Task: "Find the cause
and develop methods
to control FMD"
• During WOII interned in
Theresienstadt
OS18 GLOBAL VACCINE SECURITY
Research on virus culture
• 1930 UK and Germany
virus culture in
surviving foetal guinea
pig skin tissue
• 1935 Frenkel and v.
Waveren virus culture
in surviving foetal
bovine, porcine and
ovine skin tissue
• Better supply and no
adaptation
1949 Bovine tongue and
rumen
OS18 GLOBAL VACCINE SECURITY
OS18 GLOBAL VACCINE SECURITY
Machinery in the 50-ties
• Brushing tongues
• Harvesting
epithelium
• Virus culture in
"open" incubators
with oxygen and CO2
and antibiotics
• Storage of
formulated vaccine
OS18 GLOBAL VACCINE SECURITY
In-vitro culture enabled control
• NL first country
with nation-wide
prophylactic and
emergency
vaccination
• Followed by
other European
countries
OS18 GLOBAL VACCINE SECURITY
Jaap van Bekkum 1922 - 2018
• DVM 1951
• 1956 Deputy director "SVOI"
• 1959 Member of the RG of the STC
• 1960 Director "SVOI"
• 1972 Professor virology
• 1982 Research director "CVI"
• 1986 Retirement, also as chairman of STC
OS18 GLOBAL VACCINE SECURITY
Research on FMDV 2 main topics
Antibody response and protection
• Thesis 1959 "Neutraliserende antistoffen in sera
van tegen mond- en klauwzeer geënte runderen"
FMD persistent infection (Carriers)
• "Observation on the carrier state of cattle exposed
to FMDV." Tijdschrift Voor Diergeneeskunde 84:
1159-1164.
OS18 GLOBAL VACCINE SECURITY
OS18 GLOBAL VACCINE SECURITY
Quantification of Ab response
• Mathematics
• Probit analysis
• Previously implemented by Brooksby
• Good titre for 1 year
OS18 GLOBAL VACCINE SECURITY
Relation Ab response and protection
• High antibody titres
are correlated with
protection
• Relation depends on
interval vaccination
challenge
OS18 GLOBAL VACCINE SECURITY
Current challenges FMD vaccine
• Cheap production
• Simple production systems (like surviving tongue
epithelium)
• High yields of antigen
• Stable antigen or alternatives for stabilisation
• Good quality control
• Vaccine
• 146 S content
• Potency tests by serology (like van Bekkum developed)
• Vaccination campaign
• Check immune response in the field (like van Bekkum did)

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H.S. Frenkel and J.G van Bekkum how they improved vaccine availability and quality

  • 1. OS18 GLOBAL VACCINE SECURITY H.S. Frenkel and J.G van Bekkum how they improved vaccine availability and quality
  • 2. OS18 GLOBAL VACCINE SECURITY FMDV was a huge challenge • Before 1950 only Waldman vaccine • Huge number of cattle needed production • No containment
  • 3. OS18 GLOBAL VACCINE SECURITY Herman Salomon Frenkel (1891 – 1968) • 1930 appointed direct of the state veterinary institute • Task: "Find the cause and develop methods to control FMD" • During WOII interned in Theresienstadt
  • 4. OS18 GLOBAL VACCINE SECURITY Research on virus culture • 1930 UK and Germany virus culture in surviving foetal guinea pig skin tissue • 1935 Frenkel and v. Waveren virus culture in surviving foetal bovine, porcine and ovine skin tissue • Better supply and no adaptation 1949 Bovine tongue and rumen
  • 6. OS18 GLOBAL VACCINE SECURITY Machinery in the 50-ties • Brushing tongues • Harvesting epithelium • Virus culture in "open" incubators with oxygen and CO2 and antibiotics • Storage of formulated vaccine
  • 7. OS18 GLOBAL VACCINE SECURITY In-vitro culture enabled control • NL first country with nation-wide prophylactic and emergency vaccination • Followed by other European countries
  • 8. OS18 GLOBAL VACCINE SECURITY Jaap van Bekkum 1922 - 2018 • DVM 1951 • 1956 Deputy director "SVOI" • 1959 Member of the RG of the STC • 1960 Director "SVOI" • 1972 Professor virology • 1982 Research director "CVI" • 1986 Retirement, also as chairman of STC
  • 9. OS18 GLOBAL VACCINE SECURITY Research on FMDV 2 main topics Antibody response and protection • Thesis 1959 "Neutraliserende antistoffen in sera van tegen mond- en klauwzeer geënte runderen" FMD persistent infection (Carriers) • "Observation on the carrier state of cattle exposed to FMDV." Tijdschrift Voor Diergeneeskunde 84: 1159-1164.
  • 11. OS18 GLOBAL VACCINE SECURITY Quantification of Ab response • Mathematics • Probit analysis • Previously implemented by Brooksby • Good titre for 1 year
  • 12. OS18 GLOBAL VACCINE SECURITY Relation Ab response and protection • High antibody titres are correlated with protection • Relation depends on interval vaccination challenge
  • 13. OS18 GLOBAL VACCINE SECURITY Current challenges FMD vaccine • Cheap production • Simple production systems (like surviving tongue epithelium) • High yields of antigen • Stable antigen or alternatives for stabilisation • Good quality control • Vaccine • 146 S content • Potency tests by serology (like van Bekkum developed) • Vaccination campaign • Check immune response in the field (like van Bekkum did)