Table 1.

Efficiencies of influenza A and B virus replication in Mv1Lu and MDCK cellsa

Virus strainMv1Lu cellsMDCK cells
CPETCID50 titerCPETCID50 titer
A/PR/8/34 (H1N1)None1.75+++3.62
Sw/IndNone5.75+++5.25
A/Mallard/NY/6874/78 (H3N2)++5.125+++3.25
Udorn+++4.75+++5.75
A/Aichi (H3N2)None0.75++1.375
A/Seal/Massachusetts/92 (H3N3)++5.5+++4.25
A/Mallard/Wisconsin/994/82 (H5N2)None1.75+++2.25
Ty/OntNone3.32+++3.18
B/David Breeze/44++2.37+++2.37
B/Lee/40+5.5+++6.25
B/Hong Kong++4.659+++6.25
  • a HA positivity and TCID50titers were determined at 48 h p.i. (influenza A) and at 72 h p.i. (influenza B). TCID50 titers were determined on MDCK cells. CPE key: +, very little CPE; ++, holes in the monolayer; +++, monolayer destruction.