Dr. van Haeringen Laboratorium B.V.

H787 Trapped Neutrophil Syndrome (TNS)


Trapped Neutrophil Syndrome (TNS) is an inherited fatal immune disorder. Neutrophils are the precursors to white blood cells, produced in the bone marrow and, in a normal animal, released into the blood to fight infections. In a TNS affected animal these neutrophils cannot be released from the bone marrow so the animal is unable to mount an effective immune response to infection. Symptoms can vary greatly, depending on which infections the pup happens to contract. A bone marrow biopsy is the best way to detect the disease, if the neutrophil levels in the bone marrow are higher than those in the blood it is an indication that these are trapped hence trapped neutrophil syndrome.

Test specific information



Symptoms will develop at a young age. Within a few hours to a maximum of several weeks after birth, the characteristics that go with these genetic effects will become visible.

Turn Around Time

The turn-around-time of a test depends to a large extent on the logistics of sample transportation to the laboratory. After receiving the sample at the test location, you can normally expect the result within 10 working days. A longer delivery time applies to tests carried out by a Partner Lab.

Location of disease or trait

This disease leads to reduced immunity. Depending on the disease, the immune system may be completely absent.

Breed dependence

This DNA test is available for the following breeds: Bearded Collie, Border Collie, Rough Collies, Smooth Collies. Additional information is available in the Frequently Asked Questions (FAQ).

Sample type

For this DNA test we accept the following materials: Blood EDTA, Blood Heparin, Tissue, Swab, Semen. Please contact Dr. Van Haeringen Laboratorium if you wish to submit other material as listed.


An animal can be free and has in that situation two healthy alleles. When used in breeding this animal will not become ill due to the disease. It cannot spread the disease in the population.

An animal can be carrier and has in that situation one healthy and one disease allele. When used in breeding 50 percent of the offspring will receive the disease allele. Carriers will not become ill.

An animal can be affected and has in that situation two disease alleles. When used in breeding all offspring will also receive the disease allele. Affected will become ill.


This genetic factor is inherited in an autosomal, recessive, mode. This means, that the individual can be free of the disease (homozygote normal), affected (homozygous affected) or carrier (heterozygous).

Carriers may spread the mutation in a population without showing symptoms themselves. Because of this, it is extremely important to identify carriers correctly to prevent spreading of a mutation.

Severity of Disease


Code H787

Trapped Neutrophil Syndrome (TNS)

€ 47,80 (Incl. 21% VAT)
€ 39,50 (Excl. VAT)