Distribution of Cryptosporidium parvum gp60 subtypes in calf herds of Saxony, Germany

Parasitology Research
I HolzhausenArwid Daugschies

Abstract

Cryptosporidiosis is a common protozoan parasitic infection that causes diarrhoea in neonatal calves. The high shedding of environmentally resistant oocysts facilitates outbreaks of cryptosporidiosis in humans. In total, 58 farms (512 calves) in Germany (Saxony and Brandenburg) were visited three times each. Faecal samples of pre-weaned calves were microscopically examined for oocysts of Cryptosporidium spp. using Heine staining and were scored with regard to their consistency. Overall, 88.9% of calves tested microscopically positive for Cryptosporidium spp. in at least one sample, and the excretion of oocysts was significantly (P < 0.01) associated with a higher faecal score (diarrhoea). After DNA extraction from pooled farm isolates, 47 samples were successfully subtyped by sequence analysis of the 60 kDa glycoprotein gene (gp60). All isolates belonged to subtype family IIa. IIaA15G2R1 was the most common subtype (present on 66% of the farms), followed by IIaA16G3R1 (13%). Subtypes IIaA14G1R1, IIaA14G2R1, IIaA1612R1, IIaA16G2R1, IIaA17G1R1, IIaA17G2R1, IIaA17G4R1 and IIaA19G2R1 were found sporadically. This is the first description of gp60 subtype IIaA17G4R1 in cattle in Germany.

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Citations

Aug 24, 2019·Veterinary Parasitology·I HolzhausenA Daugschies
Jan 7, 2021·Transboundary and Emerging Diseases·Zhenjie ZhangYaoyu Feng
Aug 23, 2019·Comparative Immunology, Microbiology and Infectious Diseases·Katharina LichtmannspergerThomas Wittek

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Datasets Mentioned

BETA
MK034690
MK034691
MK034697
MK034687
JF727773.1
MF142042.1
EF073051

Methods Mentioned

BETA
PCR
electrophoresis
PCRs
ELISA

Software Mentioned

Geneious
SPSS statistics
BLAST
BLASTn

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