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110 THE INDIAN JOURNAL OF VETERINARY SCIENCE AND ANIMAL HUSBANDRY [ I, II

         Death occurred in most cases almost immediately the first symptoms were
shown, that is, on the same day or only one day later. Two birds thus died on the
second day, and the largest number died on the 3rd and 4th day after injection.

         The periods of recognisable illness before death occurred are given in the follow-
ing table, which shows that death occurred on the day the first symptoms were
exhibited in nearly one-third of the fowls; in over one-third it occurred only one
day later, and the maximum duration was 10 days. The average duration of
recognisable illness in the 96 fowls therefore amounted to only just over one-and
a-half days.

Death

Number of
fowls

Total
days

On day of first symptoms .

.

30

0

1 day later

.....

.

35

35

2 days later

.....

.

12

24

3 „

.....

.

8

24

4 „

.....

.

3

12

5 „

.....

.

3

15

6 „

.....

.

1

6

7 „

.....

.

1

7

8 „

.....

.

2

16

9

.....

.

0

0

10 „

.....

.

1

10

Total

96

149

         Average duration of illness, 1.55 days.

         The eleven birds which showed a definite reaction and recovered exhibited
symptoms as follows:—

1

2

3

4

5

6

7

8

9

10

Day of first symptoms.....

1

5

4

1

Duration of symptoms in days ....

1

1

2

2

1

1

-

3

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