,
'
TABLE 3
‘
,THE EFFECTS OF FREEZING, CYCLIC FREEZING AND THAWING, STORAGE AT LOW TEhÆPERATÜRES AND DRYING BY SUBLIMATIÛN
IN VACUO
ON
THE
TITERS
OF
VIRUSES
CLASSIFŒD
ACCORDING
TO
PHYSICO-CHÈMÏCAL
CHARACTERISTÏCS
,
_
,
Group I
Group III
Group V
Group VI
Group VIII
Respirätory Syncytial (RS)
Poovirus
Herpes Simplex
Vaccinia
Vacuolating Agent
.
,.
].,treetment
Inuenza,
Mcasles
Echo 9
(SV 40)
_
Sghç
decreasès
‘
,
No change
No change
No change
No change
'
Cychcfreezmg audï _Slightto
No change
No change
No change
No change
-
.
thawmg
”
—
.
-,
=
,
-
»
Nonfrozen,
_
Extreme decreases
No change
Slight decrease
Slight decrease
Sght
to
moderate
Î ï
…
‘
,
…
decrease
f°f30days
…
-
.
DMSO>PDA>BSM
,
Ff0æn—4OCModerateto
decrease
NO change
Sght to
moderatè
'
Frozen—40°C, RSExtremedecr‘îase
No change
change
No change
No change
InuenzaNochwge
:?
_
1 x
_
‘_
'
-
'
,
.«
,
»
Ï
-
PDA No change
_
_
’
f“
"
»‘
Frozen—76€ Markedtôextreme decreases
change;
No Change
Modérate decrease
StÔre‘d?*àt-'.ŒLÊQO-«?C;.
“
w
-
a
'
—
a
’
"
"
.
'
…
f9r13,0
:
._
,
'_
Î
,
,
.
-
'
FrOzen .+76
RS
,
,
change
'«
No change
'
No change
'
Inuenza ,: No cha'nge
'
…
-_ _
for 30"days‘ ”
’“
Measles ‘: Moderate decrease
ocâ
:»