Hamster Serum | Sterile Filtered | EU Origin

Why is Normal Hamster Serum (NHS) preferred over FBS for BHK-21 cell culture?

BHK-21 (Baby Hamster Kidney) cells are a hamster-derived cell line, and species-matched serum provides growth factors and carrier proteins that are biologically suited to hamster cells. In BHK-21 culture, NHS improves monolayer formation consistency, cell viability, and susceptibility to viruses used in vaccine production — particularly rabies and foot-and-mouth disease (FMD) viruses. FBS is the standard default supplement and remains widely used, but in vaccine manufacturing workflows where BHK-21 performance and batch-to-batch consistency are critical, substitution with NHS or partial NHS supplementation can improve outcomes and is recommended by some vaccine production protocols.

What is BHK-21, and why is it the WHO-recommended cell line for rabies vaccine production?

BHK-21 (Baby Hamster Kidney, clone 21) is a continuous cell line derived from the kidneys of newborn Syrian hamsters. It supports rapid growth, scales well in bioreactor production, and is broadly susceptible to RNA viruses including rabies virus (fixed strains), foot-and-mouth disease virus, and several arboviruses. The WHO recommends BHK-21 as an acceptable cell substrate for human rabies vaccines (WHO TRS 941, 2007), and it is the primary production cell line in fixed-dose rabies vaccine manufacturing at industrial scale. Normal Hamster Serum is the species-matched supplement for BHK-21 culture in these production settings.

Is Normal Hamster Serum suitable for CHO cell culture?

Yes — Normal Hamster Serum is relevant as a supplement for Chinese Hamster Ovary (CHO) cells and other hamster-derived cell lines. CHO cells originate from Cricetulus griseus (Chinese hamster), a related rodent species, and NHS provides species-proximate growth support. NHS is most commonly used in early cultivation phases, primary hamster cell culture (kidney, lung, ovary), and applications where serum-free or FBS-based media perform suboptimally. For standard industrial CHO bioreactor culture for recombinant protein production, serum-free media are typically used at scale — NHS supplements are relevant primarily for research-scale CHO culture and primary cell applications.

Can Normal Hamster Serum be heat inactivated, and when is this required?

Yes — heat inactivation (56 °C, 30 min) is available on request. Heat inactivation destroys complement proteins and is required for applications where complement activation in the serum supplement would interfere with the assay or cell culture system — for example, complement-sensitive cell lines, complement fixation test (CFT) controls, or ELISA protocols where complement-mediated background must be eliminated. For standard BHK-21 vaccine production culture, non-heat-inactivated NHS is typically used. Please specify the required form when requesting a quote.

What documentation is supplied with EU Origin Normal Hamster Serum?

Every order includes a Certificate of Analysis (CoA) and Certificate of Origin (CoO). Safety Data Sheet (SDS) and additional documentation — sterility and mycoplasma test protocols — are available on request. Products are handled at ISO 9001 and ISO 13485 certified partner facilities. Batch reservation for up to 36 months is available on request, which is particularly important for vaccine production programmes requiring lot-to-lot consistency in the cell culture substrate over extended manufacturing campaigns.