THEILERIASIS OF CATTLE IN INDIA
31
TABLE III
Showing the difference between various strains of Theileria including those occurring in India
(After du Toit)
Serial
No.
I
II
III
IV
V
VI
VII
VIII
IX
X
XI
XII
XIII
XIV
XV
XVI
XVII
XVIII
—
Endoglobular form
Koch's bodies
Persistence
of
parasites.
Transmission with
blood.
Natural
Trans-
mission.
Average
incuba-
tion period.
Type of infection.
Anaemia.
Icterus
Haematuria.
Mortality.
Lymph glands.
Spleen.
Kidneys.
Liver.
Abomasum
and
Intestines.
Haemorrhages
Immunity
T. parva
Over 80 per cent rod
shaped. Less than
20 per cent round or
oval.
Always present usu-
ally very numerous.
Disappear complet-
ly after recovery.
Possible but very di-
fficult.
Through
Rhipice-
phalus spp.
About 13 days.
Always acute.
Absent
or
only
slight Anisocytosis.
Very rarely present.
Absent.
90-100 per cent. In
enzootic regions less.
Always swollen.
Normal
or
only
slightly swollen.
' Infarcts ' present
Only
microscopic
changes.
Ulcerations present.
Absent.
Solid and sterile.
T. dispar
Less than 10 per cent
rod shaped. More
than 90 per cent
round or oval.
Always present, in
severe cases usually
easily demonstrat-
ed.
Disappear complete-
ly after recovery.
Easy even with small
quantities.
Through
Hyalomma
mauretanicum.
About 21 days.
Always acute.
Present. Anisocyto-
sis. Polychromato-
philia.
Frequently present.
Sometimes present.
About 20 per cent.
Swollen.
Very much swollen.
' Infarcts ' present.
Swollen.
Ulcerations present.
Present in heart and
other organs.
Solid and sterile.
T.
annulata
About 20-30 per cent
rod shaped. 70-80
per cent round or
oval.
Only present in acute
cases but then very
numerous also in
the blood.
Persist in
blood
throughout life.
Easy even with small
quantities.
Not known.
More than 20 days.
Chronic but may
become acute.
Present in acute
cases.
Sometimes present.
Absent.
5-20 per cent.
Often swollen.
Very much swollen
in acute cases.
Small haemorrhages
present.
Swollen.
Ulcerations present.
Often present.
No immunity but
state of premuni-
tion.
T. mutans
About 45 per cent
rod shaped. 55
per cent round
or oval.
Extremely
rare,
in most
cases
cannot be found
at all.
Persist in blood
throughout ife.
Easy even with
small quantities.
Through Rhipice-
phalus spp.
About 30 days.
Always chronic.
Absent or slight.
Absent.
Absent.
Nil.
Normal.
Normal.
Normal.
Normal.
Normal.
Absent.
No immunity but
state of premu-
nition.
Theileria
sp.
(Type A)
A very large pro-
portion (exact per-
centage not work-
ed out) round.
As a rule rare, but
have been found
in very
large
numbers in a few
cases.
Persist in blood.
throughout life.
Not known.
„
„
Chronic but may
become acute.
Present in acute
cases.
Sometimes present.
Absent.
25 to 30 per cent.
Swollen.
Swollen.
No special charact-
er mentioned.
Swollen.
Ulcerations present
Not mentioned.
No immunity but
state of premu-
nition.
Theileria
sp.
(Type B)
90-100 per
cent
round.
Always
present
in blood.
Disappear
com-
pletely
from
blood after recov¬
ery.
Easy even
with.
small quantities.
Not known.
Average of about
145 cases 16 days.
Acute.
Present when re-
covery
takes
place.
Often present.
Absent.
Over 75 per cent.
Always swollen.
Always
swollen,
oedematous
and
congested.
Both ' infarcts' and
haemorrhagic
spots present.
Very
much
swollen.
Ulcerations present.
Absent.
Solid and sterile.