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First report on the occurrence of psoroptic mange in llamas (Lama glama) of the Andean region
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First report on the occurrence of psoroptic mange in llamas (Lama glama) of the Andean region
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Journal Article
First report on the occurrence of psoroptic mange in llamas (Lama glama) of the Andean region
2024
Overview
An outbreak of
Psoroptes
sp.-caused mange was detected in a llama herd of Larcas, Jujuy province, Argentina. Infested llamas showed alopecia, erythema, hyperpigmentation, hyperkeratosis, and inflammation of the ear pinnae, as well as crusts and serous, serosanguineous, or purulent drainage with unpleasant smell in the external ear canal. Microscopic evaluation of skin scrapings revealed 0.5- to 0.7-mm-long acari identified as
Psoroptes
sp. based on their morphology. Histology showed a typical allergic reaction with perivascular to periadnexal mixed inflammatory infiltrate. Phylogenetic tree analysis showed that the
cytochrome c oxidase subunit I
gene sequences analyzed from the sampled acari clustered into a single
P. ovis
clade including sequences isolated from rabbits and bighorn sheep, with
P. natalensis
as a sister taxon that infested bighorn sheep from the USA. Phylogenetic analysis of
cytochrome b
sequences showed three well-supported clades, one of which contained the sequences of the Larcas llamas and US bighorn sheep isolates. This is the first report on
P. ovis
infestation of llamas raised in their original location. Investigations on mange etiological agents acting on South American camelids and their distribution are necessary to implement control strategies to mitigate the negative impacts of these parasitic infections.
Publisher
Springer,Springer Berlin Heidelberg,Springer Nature B.V
Subject
/ Alopecia
/ Animals
/ Baldness
/ Biomedical and Life Sciences
/ Biopsy
/ Camelids
/ Camelids, New World - parasitology
/ Disease Outbreaks - veterinary
/ Diseases
/ drainage
/ Ear
/ Electron Transport Complex IV - genetics
/ Erythema
/ etiology
/ genes
/ Growth
/ herds
/ Llamas
/ Mite Infestations - epidemiology
/ Mite Infestations - parasitology
/ Mite Infestations - veterinary
/ Psoroptidae - classification
/ Skin
/ smell
