Determination of haptoglobin quantity in milk
A milking arrangement includes a milking machine for milking an animal, where the milking arrangement includes an analysing unit configured to determining a value of haptoglobin quantity in a milk sample taken from milk harvest by the milking machine. The analysing unit including a haptoglobin sensor device configured to provide a value of haptoglobin quantity in the milk sample.
1 . A milking arrangement comprising:
a milking machine ( 14 ) for milking an animal; and
an analysing unit ( 10 ) configured to determine a value of haptoglobin quantity in a milk sample taken from milk harvest by the milking machine ( 14 ), said analysing unit ( 10 ) comprising:
a haptoglobin sensor device ( 12 ) configured to provide a value of haptoglobin quantity ( 15 ) in said milk sample, and
a processor ( 13 ),
wherein said processor ( 13 ) is configured, on the basis of a reaction time being a time during which said milk sample has been in contact with the haptoglobin sensor device, to:
determine, when the reaction time exceeds a threshold time ( 16 ), if the provided value of haptoglobin quantity is above a haptoglobin threshold ( 17 ), and
in a confirmative case, assign the provided value of haptoglobin quantity to be a determined value of haptoglobin quantity, and
in a non-confirmative case, increase the reaction time to a total reaction time, and at a point in time where the reaction time exceeds the total reaction time, provide a further value of the haptoglobin quantity in the milk sample and assign the provided further value of haptoglobin quantity to be the determined value of haptoglobin quantity.
2 . The milking arrangement according to claim 1 , further comprising a diluent container that uses a diluent to dilute the milk sample prior to being provided to the haptoglobin sensor device ( 12 ),
wherein the haptoglobin sensor device ( 12 ) is configured to provide the value of haptoglobin quantity ( 15 ) in said milk sample having been diluted by the diluent, and the total reaction time is determined on the basis of an amount of the diluent added to the said milk sample.
3 . The milking arrangement according to claim 2 , wherein the proportion of milk and diluent in the milk sample is selected in a range between 45% up to 85% milk and 55% down to 15% diluent.
4 . The milking arrangement according to claim 1 , wherein the haptoglobin sensor device ( 12 ) comprising an optical device ( 19 ) configured to optically read:
a test signal at a test line of a dry stick ( 20 ), and wherein
said processor ( 13 ) is configured to determine said provided value of haptoglobin quantity based on said test signal.
5 . The milking arrangement according to claim 4 , wherein the optical device ( 19 ) comprises a CCD-chip or a camera configured to optically read a colour intensity of the test line.
6 . The milking arranged arrangement according to claim 5 , wherein said processor is configured to determine the test signal on the basis of a colour intensity variation across the test line.
7 . The milking arrangement according to claim 4 , further comprising a first database look-up in a first database storing corresponding values of test signal, wherein said processor is configured to determine said provided value of haptoglobin quantity by a database look-up in the first database storing corresponding values of test signal.
8 . The milking arrangement according to claim 1 ,
wherein the haptoglobin sensor device ( 12 ) comprising an optical device ( 19 ) configured to optically read:
a test signal at a test line of a dry stick ( 20 ), and
a control signal at a control line of said dry stick,
wherein said processor is further configured to determine said provided value of haptoglobin quantity based on an algebraic relationship between the test signal and the control signal and haptoglobin quantity.
9 . The milking arrangement according to claim 5 , wherein said dry stick ( 20 ) comprises:
a base pad configured to allow lateral flow of fluid therethrough;
the base pad comprising a labelled-control conjugate and a labelled-conjugate diffusibly arranged herein, wherein said labelled-conjugate binds haptoglobin, and wherein a complex is formed between said labelled-conjugate and said haptoglobin when said dry stick is in use and said haptoglobin is present,
wherein said base pad further comprises
a test line comprising immobilised target analyte, wherein said immobilised target analyte binds to said labelled-conjugate when not in said complex; and
a control line, which is spaced from said test line, and which comprises control analyte configured to bind to said labelled-control conjugate.
10 . The milking arrangement according to claim 1 , wherein the haptoglobin threshold is larger than 2.0 μg haptoglobin per ml milk and smaller than 20.0 μg haptoglobin per ml milk.
11 . The milking arrangement according to claim 1 , wherein the threshold time is larger than 3.0 minutes and smaller than 10 minutes and the total reaction time is less than 15.0 minutes.
12 . The milking arrangement according to claim 1 , wherein analysing unit is configured to:
digitally receive an identifier uniquely identifying a particular animal from which the milk sample is taken,
digitally link the identifier and the determined value of haptoglobin quantity for the milk sample taken from said particular animal, and
digitally output the linked identifier and determined value of haptoglobin quantity.
13 . The milking arrangement according to claim 1 , wherein the analysing unit ( 13 ) comprises a time counter configured to count the elapsed reaction time, and said processor ( 13 ) being configured to start the time counter when said processor ( 13 ) determines the point in time when the milk sample is applied to the haptoglobin sensor device ( 12 ).
14 . The milking arrangement according to claim 1 , wherein said processor ( 13 ) determines the point in time when the milk sample is applied to the haptoglobin sensor device ( 12 ) on the basis
of a user input, or
of a digital input to the processor ( 13 ), said digital input being generated as a result of a milk sample has been applied to the haptoglobin sensor device ( 12 ).
15 . The milking arrangement according to claim 1 , the milking arrangement further comprising
a milking device ( 20 ) configured to milk the animal, and
a sampling device fluidicly connected to milking device to sample the milk sample and apply at least a fraction of the milk sample to said haptoglobin sensor device ( 12 ).
16 . A method of determining a haptoglobin quantity in a milk sample, the method being carried out by use of milking arrangement according to claim 1 , and comprising:
obtaining the milk sample, applying the milk sample to the haptoglobin sensor device ( 12 ) and determining a point in time when the milk sample is applied to the haptoglobin sensor device ( 12 ), and
determining, when the reaction time exceeds the threshold time, if the provided value of haptoglobin quantity is above the haptoglobin threshold, and
in confirmative case, assign the provided value of haptoglobin quantity to be the determined value of haptoglobin quantity, and
in non-confirmative case, increase the reaction time to the total reaction time and assign the further provided value of haptoglobin quantity to be determined value of haptoglobin quantity at the point in time where the reaction time exceeds the total reaction time.
17 . The milking arrangement according to claim 15 , further comprising:
a cabinet housing the haptoglobin sensor device, dry sticks,
a conveyer located within the cabinet and on which the dry sticks are placed and moved, by the conveyer, in a first direction,
the cabinet connected to the sampling device with the sampling device arranged to apply the at least a fraction of the milk sample to individual ones of the dry sticks on the conveyer for analysis by said haptoglobin sensor device within the cabinet.
18 . The milking arrangement according to claim 17 , wherein an interior of the cabinet forms a controlled-atmosphere incubator with at least one of humidity and temperature being controllable.
19 . The milking arrangement according to claim 17 , further comprising a diluent container that uses a diluent to dilute the milk sample prior to being provided to the haptoglobin sensor device ( 12 ),
wherein the haptoglobin sensor device ( 12 ) is configured to provide the value of haptoglobin quantity ( 15 ) in said milk sample having been diluted by the diluent, and the total reaction time is determined on the basis of an amount of the diluent added to the said milk sample.
20 . A milking arrangement comprising:
a milking machine ( 14 ) for milking an animal; and
an analysing unit ( 10 ) configured to determining a value of haptoglobin quantity in a milk sample taken from milk harvest by the milking machine ( 14 ) and having been diluted by a diluent, said analysing unit ( 10 ) comprising:
a haptoglobin sensor device ( 12 ) configured to provide a value of haptoglobin quantity ( 15 ) in said milk sample, and
a processor ( 13 ),
wherein said processor ( 13 ) is configured to assign the provided value of haptoglobin quantity to be a determined value of haptoglobin quantity when a reaction time, being a time during which said milk sample has been in contact with the haptoglobin sensor device, exceeds a total reaction time, and wherein the total reaction time is determined on the basis of an amount of the diluent added to said milk sample.