Applying Central Composite Design and Response Surface Methodology to Optimize Growth and Biomass Production of Haemophilus influenzae Type b

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MOMEN SEYED BAHMAN; SIADAT SEYAD DAVAR; AKBARI NEDA; RANJBAR BIJAN; KHAJEH KHOSRO

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Journal: Jundishapur Journal of Microbiology Year:2016 | Volume:9 | Issue:6 Page(s): 0-0

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Title

Applying Central Composite Design and Response Surface Methodology to Optimize Growth and Biomass Production of Haemophilus influenzae Type b

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Keywords

Response Surface Methodology (RSM)

Haemophilus influenzae type b (Hib)

Growth Optimization

Polyribosyl Ribitol Phosphate (PRP)

Biomass

Abstract

Background: Haemophilus influenzae type b (Hib) is the leading cause of bacterial meningitis, otitis media, pneumonia, cellulitis, bacteremia, and septic arthritis in infants and young children. The Hib capsule contains the major virulence factor, and is composed of polyribosyl ribitol phosphate (PRP) that can induce immune system response. Vaccines consisting of Hib capsular polysaccharide (PRP) conjugated to a carrier protein are effective in the prevention of the infections. However, due to costly processes in PRP production, these vaccines are too expensive. Objectives: To enhance Biomass, in this research we focused on optimizing Hib growth with respect to physical factors such as pH, temperature, and agitation by using a response surface methodology (RSM). Materials and Methods: We employed a central composite design (CCD) and a response surface methodology to determine the optimum cultivation conditions for growth and Biomass production of H. influenzae type b. The treatment factors investigated were initial pH, agitation, and temperature, using shaking flasks. After Hib cultivation and determination of dry Biomass, analysis of experimental data was performed by the RSM-CCD. Results: The model showed that temperature and pH had an interactive effect on Hib Biomass production. The dry Biomass produced in shaking flasks was about 5470 mg/L, which was under an initial pH of 8. 5, at 250 rpm and 35° C. Conclusions: We found CCD and RSM very effective in optimizing Hib culture conditions, and Hib Biomass production was greatly influenced by pH and incubation temperature. Therefore, optimization of the growth factors to maximize Hib production can lead to 1) an increase in bacterial Biomass and PRP productions, 2) lower vaccine prices, 3) vaccination of more susceptible populations, and 4) lower risk of Hib infections.

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APA: Copy

MOMEN, SEYED BAHMAN, SIADAT, SEYAD DAVAR, AKBARI, NEDA, RANJBAR, BIJAN, & KHAJEH, KHOSRO. (2016). Applying Central Composite Design and Response Surface Methodology to Optimize Growth and Biomass Production of Haemophilus influenzae Type b. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), 9(6), 0-0. SID. https://sid.ir/paper/317887/en

Vancouver: Copy

MOMEN SEYED BAHMAN, SIADAT SEYAD DAVAR, AKBARI NEDA, RANJBAR BIJAN, KHAJEH KHOSRO. Applying Central Composite Design and Response Surface Methodology to Optimize Growth and Biomass Production of Haemophilus influenzae Type b. JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM)[Internet]. 2016;9(6):0-0. Available from: https://sid.ir/paper/317887/en

IEEE: Copy

SEYED BAHMAN MOMEN, SEYAD DAVAR SIADAT, NEDA AKBARI, BIJAN RANJBAR, and KHOSRO KHAJEH, “Applying Central Composite Design and Response Surface Methodology to Optimize Growth and Biomass Production of Haemophilus influenzae Type b,” JUNDISHAPUR JOURNAL OF MICROBIOLOGY (JJM), vol. 9, no. 6, pp. 0–0, 2016, [Online]. Available: https://sid.ir/paper/317887/en

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