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Clinical cases of Cryptosporidium spp. infections in parrots, canaries and pigeons confirmed by molecular and immunochromatographic methods Cover

Clinical cases of Cryptosporidium spp. infections in parrots, canaries and pigeons confirmed by molecular and immunochromatographic methods

Open Access
|Feb 2026

Figures & Tables

Fig. 1.

Phylogenetic relationships of 32 nucleotide sequences of Cryptosporidium species isolated from pet birds. The analysis was performed using the neighbour-joining method based on nucleotide sequences of the small-subunit ribosomal RNA gene. The evolutionary distances were computed using the Kimura two-parameter method and are the numbers of base substitutions per site. Two-letter and six-digit codes are GenBank accession numbers. Toxoplasma gondii was used as the outgroup
Phylogenetic relationships of 32 nucleotide sequences of Cryptosporidium species isolated from pet birds. The analysis was performed using the neighbour-joining method based on nucleotide sequences of the small-subunit ribosomal RNA gene. The evolutionary distances were computed using the Kimura two-parameter method and are the numbers of base substitutions per site. Two-letter and six-digit codes are GenBank accession numbers. Toxoplasma gondii was used as the outgroup

Fig. 2.

Melting curves obtained during qPCR-high-resolution melting analysis of the products of amplification of isolates of Cryptosporidium spp. from the faeces of pet birds. The paired curves for C. meleagridis and C. proventriculi indicate technical replicates or distinct isolates. RFU – relative fluorescence units
Melting curves obtained during qPCR-high-resolution melting analysis of the products of amplification of isolates of Cryptosporidium spp. from the faeces of pet birds. The paired curves for C. meleagridis and C. proventriculi indicate technical replicates or distinct isolates. RFU – relative fluorescence units

Fig. 3.

Derivative melting curve analysis of the products of amplification of isolates of Cryptosporidium spp from the faeces of pet birds. The paired curves for C. meleagridis and C. proventriculi indicate technical replicates or distinct isolates. –dF/dT – negative first derivative of fluorescence with respect to temperature
Derivative melting curve analysis of the products of amplification of isolates of Cryptosporidium spp from the faeces of pet birds. The paired curves for C. meleagridis and C. proventriculi indicate technical replicates or distinct isolates. –dF/dT – negative first derivative of fluorescence with respect to temperature

Results of the PCR test for the presence of two Cryptosporidium spp_ in the studied bird group

SpeciesnC. proventriculiC. meleagridis
n (+)%n (+)%
African grey parrot (Psittacus erithacus)3266.7133.3
Blue-and-yellow macaw (Ara ararauna)200.000.0
Blue-fronted amazon (Amazona aestiva)2150.000.0
Blue-headed pionus (Pionus menstruus)100.000.0
Budgerigar (Melopsittacus undulatus)400.000.0
Canary (Serinus canaria)300.000.0
Cockatiel (Nymphicus hollandicus)2063000.0
Eastern rosella (Platycercus eximius)200.000.0
Moluccan eclectus (Eclectus roratus)1110000.0
Golden-collared macaw (Primolius auricollis)1110000.0
Green-cheeked conure (Pyrrhura molinae)3133.300.0
Peach-faced lovebird (Agapornis roseicollis)412500.0
Pigeon (Columba livia)800.0562.5
Plum-headed parakeet (Psittacula cyanocephala)200.000.0
Rainbow Lorikeet (Trichoglossus moluccanus)200.000.0
Ring-necked parakeet (Psittacula krameri)100.000.0
Senegal parrot (Poicephalus senegalus)100.000.0
Sun conure (Aratinga solstitialis)100.000.0
Timneh grey parrot (Psittacus erithacus timneh)1110000.0
Yellow-headed amazon (Amazona oratrix)1110000.0
Total631523.869.52

Diagnostic performance of the immunochromatographic assay evaluated against one-tube nested real-time PCR for detection of Cryptosporidium spp_ in avian faeces

Positive (ref. method n = 21)Negative (ref. method n = 42)
IC rapid assay positive145
IC rapid assay negative737
Language: English
Submitted on: Aug 6, 2025
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Accepted on: Feb 11, 2026
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Published on: Feb 16, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2026 Dawid Jańczak, Aleksandra Kornelia Maj, Piotr Górecki, Olga Szaluś-Jordanow, Anna Golke, published by National Veterinary Research Institute in Pulawy
This work is licensed under the Creative Commons Attribution 4.0 License.

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