Calculated Factors:
Whitlock Paracytometer 2 X 0.6ml slide
The mean of two counts is recommended in calculating egg counts.
(click here to see the equation and general calculations
to calculate eggs per gram from a worm egg count)



Eggs counted in

1 strip 
2 strips

4 strips
=1chamber 
2 chambers 



weight of faeces

Water

Saturated Salt Solution 
Dilution 
0.15 ml

0.3 ml

0.6 ml

1.2 ml

. 
recommended for






FACTOR x 






2 g

20 ml

38 ml

1:30

200 
100

50 
25 

Sheep


5 g

30 ml

55 ml

1:18

120

60

30

15


Cattle

2 counts essential

4g

20 ml

36 ml

1:15

100

50

25




Horses

2 counts essential




For other dilutions: 







2g

2.5 ml

45.5 ml

1:25

167

83

41.5




impractical factors

*












* recommended
generic dilution para 9.1 of reference.
Reference:
Details about the techniques
which use these slides may be found in the Section on Anthelmintic Resistance
in Sheep (para 9.1 in particular) in
Australian
Standard Diagnostic Techniques for Animal Diseases.
 ISBN 0 643 05243 7 636.0896075
developed through the Standing
Committee on Agriculture and Resource Management, Animal Health Committee,
Subcommittee on Animal Health
Laboratory Standards
and published on their behalf
by CSIRO Information Services, Australia.
(Note that the recommended dilution is intended
for the Whitlock Universal slide to give
the simple Factor as above. Alternatives are permitted)
select here for
Last Update: 16/06/99