Calculated Factors:
Whitlock Universal 4 X 0.5ml 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)
For
2g faeces in 48ml of flotation solution (2g:50ml)

1 strip 
2 strips

4 strips

1 chamber
=5 strips 
2 chambers 
4 chambers 

Eggs counted in

0.1ml

0.2ml

0.4ml

0.5 ml

1.0 ml

2.0 ml

Dilution

2g:50ml








FACTOR x

250

125

62.5

50

25

12.5

1:25 *

.

.



.

.

.

.

.

For other dilutions:







1.5g:60ml x

400

200

100

80

40

20

1:40

2g:60ml x

300

150

75

60

30

15

1:30

3g:60ml x

200

100

50

40

20

10

1:20

4g:60ml x

150

75

37.5

30

15

7.5

1:15

1g:50ml

500

250

125

100

50

25

1:50

* recommended generic dilution
para 9.1 of reference for simplest calculations
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: 30/11/2011 (typo in strip volumes corrected)