title: Assessment of safety and immunogenicity of two different lots of diphtheria, tetanus, pertussis, hepatitis B and Haemophilus influenzae type b vaccine manufactured using small and large scale manufacturing process.
abstract: BACKGROUND
  Hib vaccine can be easily incorporated in EPI vaccination schedule as the immunization schedule of Hib is similar to that of DTP vaccine. To meet the global demand of Hib vaccine, SIIL scaled up the Hib conjugate manufacturing process. This study was conducted in Indian infants to assess and compare the immunogenicity and safety of DTwP-HB+Hib (Pentavac(®)) vaccine of SIIL manufactured at large scale with the 'same vaccine' manufactured at a smaller scale.
  
  
  METHODS
  720 infants aged 6-8 weeks were randomized (2:1 ratio) to receive 0.5 ml of Pentavac(®) vaccine from two different lots one produced at scaled up process and the other at a small scale process. Serum samples obtained before and at one month after the 3rd dose of vaccine from both the groups were tested for IgG antibody response by ELISA and compared to assess non-inferiority.
  
  
  RESULTS
  Neither immunological interference nor increased reactogenicity was observed in either of the vaccine groups. All infants developed protective antibody titres to diphtheria, tetanus and Hib disease. For hepatitis B antigen, one child from each group remained sero-negative. The response to pertussis was 88% in large scale group vis-à-vis 87% in small scale group. Non-inferiority was concluded for all five components of the vaccine. No serious adverse event was reported in the study.
  
  
  CONCLUSIONS
  The scale up vaccine achieved comparable response in terms of the safety and immunogenicity to small scale vaccine and therefore can be easily incorporated in the routine childhood vaccination programme.
authors: Serum Institute of India Ltd., 212/2, Hadapsar, Pune 411028, India. drhjs@seruminstitute.com
authors: Hitt J
authors: HJ
authors: Sharma
authors: Vishwanath D
authors: VD
authors: Patil
authors: Sanjay K
authors: SK
authors: Lalwani
authors: Mamta V
authors: MV
authors: Manglani
authors: Latha
authors: L
authors: Ravichandran
authors: Subhash V
authors: SV
authors: Kapre
authors: Suresh S
authors: SS
authors: Jadhav
authors: Sameer S
authors: SS
authors: Parekh
authors: Girija
authors: G
authors: Ashtagi
authors: Nandini
authors: N
authors: Malshe
authors: Sonali
authors: S
authors: Palkar
authors: Minal
authors: M
authors: Wade
authors: T K
authors: TK
authors: Arunprasath
authors: Dinesh
authors: D
authors: Kumar
authors: Sunil D
authors: SD
authors: Shewale
mesh_terms: D000907:Antibodies, Bacterial / Q000097:blood; D000914:Antibodies, Viral / Q000097:blood; D015721:Diphtheria-Tetanus-Pertussis Vaccine / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology*; D018073:Haemophilus Vaccines / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology*; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007194:India; D007231:Infant, Newborn; D008297:Male; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage / Q000009:adverse effects* / Q000276:immunology*; D013678:Technology, Pharmaceutical / Q000379:methods*; D014611:Vaccination / Q000009:adverse effects* / Q000379:methods*; D017778:Vaccines, Combined / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000914:Antibodies, Viral; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D018073:Haemophilus Vaccines; D007074:Immunoglobulin G; C426945:Pentavac; D011054:Poliovirus Vaccine, Inactivated; D017778:Vaccines, Combined