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Feline Hemotropic Mycoplasma (FHM)

 

Feline Hemotropic Mycoplasma (FHM)

Eliminate the challenges in diagnosing feline anemia

FHM is a common cause of severe hemolytic anemia in cats.
In a recent nationwide study1:

  • 12.7% of healthy blood donor pet cats were infected with feline hemotropic mycoplasmas
  • A higher rate of FHM infection was found in outdoor cats and cats exposed to fleas

Until now, diagnosing feline hemotropic mycoplasmosis (formerly hemobartonellosis or feline infectious anemia) has been a challenge. The pathogenicity of FHM species differs:

  • Most pathogenic: Mycoplasma haemofelis
  • Moderately pathogenic: Candidatus Mycoplasma turicensis
  • Least pathogenic: Candidatus Mycoplasma haemominutum

Because of these differences in pathogenicity, the IDEXX RealPCR™ FHM tests help you determine the significance of an FHM infection, which may affect case management, including the pursuit of additional diagnostics and treatment.

Visual slide review cannot distinguish FHM species, but real-time PCR can. Compare these two methods below to see how real-time PCR detects infections that a manual slide review can miss:

IDEXX RealPCR vs. Slide Review by Trained Technicians (Total samples = 303a)

 
Positives found
by IDEXX RealPCR
Positives found by slide review
Positive for any species 88 (29.0%) 10 (3.3%)
Positives by species or species combination Mhf: 21 (6.9%)
CaMh: 41 (13.5%)
CaMt: 5 (1.7%)
Mhf & CaMh: 8 (2.6%)
Mhf & CaMt: 3 (1.0%)
CaMh & CaMt: 3 (1.0%)
Mhf & CaMh & CaMt: 7 (2.3%)
Could not distinguish species

Mhf = Mycoplasma haemofelis
CaMh = Candidatus Mycoplasma haemominutum
CaMt = Candidatus Mycoplasma turicensis
a. All samples were whole blood from cats with hematocrit less than 25%.

1 Hackett TB, Jensen WA, Lehman TL, et al. Prevalence of DNA of Mycoplasma haemofelis, ‘Candidatus Mycoplasma haemominutum,’ Anaplasma phagocytophilum, and species of Bartonella, Neorickettsia, and Ehrlichia in cats used as blood donors in the United States. J Am Vet Med Assoc. 2006;229(5):700–705.

IDEXX RealPCR FHM Tests and Profiles available
Test Code
1717 IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis
17170 IDEXX RealPCR FHM Follow-up
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis
17171 IDEXX RealPCR FHM Add-on
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis
2529 Anemic Cat CBC with
IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC
2530 Anemic Cat HealthChek
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 25
2531 Anemic Cat HealthChekPlus
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 25, T4
2532 Anemic Cat Total Health
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 27
2533 Anemic Cat Total Health Plus
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 27, T4
2534 Anemic At-Risk Cat Profile
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 27, T4, FeLV, FIV, UA
2535 Anemic Cat Combo Profile
with IDEXX RealPCR FHM Test
  Mycoplasma haemofelis, Candidatus Mycoplasma haemominutum, Candidatus Mycoplasma turicensis, comprehensive CBC, Chem 25, FeLV, FIV

 
Use the test codes below or see our Directory of PCR Services for a complete list of tests. (321 KB)
 
For more information call our Internal Medicine Team at 1-888-433-9987, option 4, option 2.
 
FHM Diagnostic Update (77 KB)
Feline Anemia Diagnostic Algorithm (65 KB)
RealPCR FAQ

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