Tank SCC vs Cis SCC

[O'Reilly]

For a few months we have been over 200 SCC and missing out on 0.5ppl, so I have been doing the obvious, drying off highscc cows early, or culling, to no avail. Its not unusual at this time of year, its late lactation, volumes are dropping, so one rogue cow can easily affect the bulk test.

What I cannot understand, is how the bulk test done by CIS is much lower than the one taken by the milk tanker. Last milk recording, bulk test 113, last couple of tanker tests, 240 and 199. As far as I know, they both use nml for testing. I did wonder if the drivers weren't agitating for long enough/at all, but when I see them, they usually do.

Any ideas?

 

[awkward]

Dirty sampler on truck ?. Could driver take sample out of tank direct

 

[Rossymons]

My last CIS results came back with 10% of the cow numbers wrong which was quite annoying.

 

[Princess Pooper]

If you have one or two cows with a chronic infection they can vary a lot day to day which at lower volumes can make a big difference to bulk SCC. How would a dirty sampler affect SCC (rather than bacto?)

 

[O'Reilly]

Dirty sampler on truck ?. Could driver take sample out of tank direct

That would affect the bacto, but shouldn't affect SCC, unless the sampler is in some way inaccurate. Some trucks have the auto sampler, others don't. It will help a bit when we're arla members and on every sample testing because we'll see more of a trend. Atm our milk is bought by first milk and picked up by arla, so I doubt we'll get a straight answer from anyone.
Thanks anyway.

 

[organicguy]

Is there any correlation with high BF when you have high SCC? Poorly agitated tank would show that.

 

[Farmer Keith]

Have you not got the result off the tanker from the day you milk recorded?

 

[Sid]

If your SCC rises so can your bactoscan

 

[cattow]

Not the same lab, not that it should make a difference.
NML is at Wolverhampton, CIS is at Telford

 

[O'Reilly]

Is there any correlation with high BF when you have high SCC? Poorly agitated tank would show that.

No, last bulk test, 20th fat was down below 4 (unusual for us, but change of field) but cells were 260. Milk recording on 18th, bulk test was 113, no clinical cases appeared in the mean time, although heat stress may come into it. The trend has been consistent over a few months, the Cis SCC is way below the nml one. I wouldn't mind, but I'd like to know which is correct. I might try a third lab for a few samples.

 

[O'Reilly]

If your SCC rises so can your bactoscan

Bacto stable below 20

 

[O'Reilly]

Not the same lab, not that it should make a difference.
NML is at Wolverhampton, CIS is at Telford

Oh, now that IS worth knowing, I don't know why I thought they were doing the Cis work, but anyway, that is likely the source of the discrepancy.

Thanks all.

 

[Sid]

If your SCC rises so can your bactoscan

Bacto stable below 20

thats good then.

 

[celtis man]

We have seen the same thing before, cis is always a bit lower -you should ring your milk buyer and dispute the results