Exotics and Zoo Animals
Advanced Diagnostic Testing for Birds, Exotics, and Zoological Species
Advanced diagnostic options for birds, exotic animals, and zoological species may include culture and sensitivity, cytology, histopathology, PCR or qPCR, imaging, serology, parasitology, and next-generation sequencing. Each method can provide useful information, but exotic and zoo animal cases often require a broader diagnostic view because species, sample types, microbial growth conditions, and suspected organisms can vary widely.
MiDOG’s next-generation sequencing approach helps veterinary teams evaluate microbial DNA directly from a submitted sample. This can support case review when organisms may be difficult to culture, slow-growing, unexpected, part of a mixed infection, or not included on a targeted PCR panel.
For exotic animal veterinarians, zoo teams, aquarium teams, wildlife professionals, and conservation medicine programs, MiDOG testing can provide broader microbial insight from a wide range of animal species and sample types.
The MiDOG All-in-One Test offers a comprehensive testing solution for any exotic animal species and any sample type
Clinicians currently utilize diagnostic methods such as culture and sensitivity, as well as PCR or quantitative PCR (qPCR) testing. While culture and sensitivity remain the gold standard, there are notable limitations. The diverse array of pathogenic bacterial and fungal organisms necessitates careful consideration of incubation media, temperatures, oxygen levels, water contents, and incubation time to cater to individual pathogen growth requirements.
For instance, clinically relevant bacterial pathogens in avian and reptilian pets, like Flavobacterium spp., Pseudomonas spp., Mycobacteria spp., or Mycoplasma spp., exhibit slower growth in the laboratory than other bacteria. Failure to address these unique requirements could lead to misdiagnosis due to the potential overgrowth of fast-growing bacteria. Additionally, variations in body temperatures among small exotic pet mammals, avian pets, reptiles, amphibians, fish, and invertebrates require different temperatures for culture growth of microbial samples.
The MiDOG All-in-One Test, which is based on next-generation DNA sequencing (NGS), emerges as a potential solution, combining the benefits of qPCR and culture and sensitivity testing. NGS uses microbial DNA or RNA as the analyte, offering high sensitivity and specificity without the need for target panel selection.
A recent study highlighted the limitations of traditional culture testing, revealing that it failed to detect 15% of putative bacterial and 81% of putative fungal pathogens identified by next-generation sequencing (NGS). The likelihood of a “no growth” diagnosis was significantly higher with culture-based methods compared to NGS testing. Importantly, culture methods are also inherently limited in their ability to detect fastidious, unculturable, or non-culturable organisms, including many parasitic and polymicrobial infections.
Specifically, culture testing missed
Strict and facultative anaerobic bacteria
(e.g., Enterococcus, Salmonella, Helicobacter, Klebsiella…)
Slow growing bacteria
(e.g., Mycoplasma, Mycobacterium…)
Gram positive bacteria
(e.g., Corynebacterium…)
Novel and rare pathogens
(e.g., Riemerella, Granulicatella, Fusarium…)
All fungi
(e.g., Nannizziopsis, Fusarium, Malassezia, Cryptococcus, Trichosporon, Candida, Aspergillus…)
Parasites (Protozoa & Helminths)
(e.g., Giardia, Cryptosporidium, Toxoplasma, Cystoisospora, Tritrichomonas, Babesia, Leishmania, Ancylostoma, Toxocara, Trichuris…)
Difficult-to-detect or intermittently shed organisms
(including non-culturable and microscopy-limited parasites)
For veterinarians dealing with exotic pets, the MiDOG All-in-One Test emerges as the preferred choice, providing a comprehensive solution to address the unique challenges associated with diagnosing infectious diseases in this diverse and specialized population.
FAQs About Advanced Diagnostic Testing for Exotics and Zoo Animals
What advanced diagnostic options are available for birds, exotics, and zoological species?
Veterinary teams may use culture, PCR or qPCR, cytology, histopathology, imaging, serology, parasitology, and next-generation sequencing to evaluate birds, exotic pets, zoo animals, wildlife, and aquatic species. MiDOG’s NGS-based testing can complement these methods by providing a broader microbial view from the submitted sample.
Why can infectious disease testing be more challenging in exotic and zoo animals?
Infectious disease testing can be more challenging in exotic and zoo animals because microbial growth requirements, body temperatures, sample types, anatomy, handling constraints, and suspected pathogens vary across species. Some organisms may also be slow-growing, difficult to culture, intermittently shed, or present as part of a mixed microbial community.
How can NGS support exotic animal infection testing?
NGS can support exotic animal infection testing by analyzing microbial DNA directly from the sample rather than relying only on organism growth or a predefined target list. This can help veterinary teams evaluate bacteria, fungi, parasites, and antimicrobial resistance markers depending on the test ordered.
Why can infectious disease testing be more challenging in exotic and zoo animals?
Infectious disease testing can be more challenging in exotic and zoo animals because microbial growth requirements, body temperatures, sample types, anatomy, handling constraints, and suspected pathogens vary across species. Some organisms may also be slow-growing, difficult to culture, intermittently shed, or present as part of a mixed microbial community.
When should exotic animal veterinarians consider MiDOG testing?
Exotic animal veterinarians may consider MiDOG testing when a broader microbial profile could support case review. This may include chronic or recurrent infections, culture-negative cases, mixed infections, non-healing lesions, respiratory concerns, gastrointestinal signs, parasitic concerns, unusual organisms, or cases where targeted testing may not provide the full picture.
Can MiDOG testing be used for birds, reptiles, amphibians, fish, and invertebrates?
MiDOG testing can support a wide range of animal species, including birds, reptiles, amphibians, fish, invertebrates, exotic companion animals, zoo animals, wildlife, and aquatic species. Sample suitability may depend on the clinical question, species, sample type, and test ordered.
How does MiDOG complement culture and PCR in exotic animal medicine?
Culture and PCR remain useful diagnostic tools. Culture can help when viable organism growth and phenotypic susceptibility testing are needed, while PCR can be useful for specific suspected organisms. MiDOG complements these methods by using NGS to provide a broader microbial profile when the organism is unknown, difficult to culture, or potentially part of a mixed infection.
What types of organisms can MiDOG help evaluate in exotic and zoo animal samples?
Depending on the test ordered, MiDOG testing may provide insight into bacteria, fungi, parasites, antimicrobial resistance markers, and other microbial features from the submitted sample. Reports should be interpreted by the veterinarian alongside clinical signs, sample type, patient history, and other diagnostic findings.
