ISSN 2398-2950      

Neotrombicula autumnalis infestation

ffelis

Synonym(s): Harvest mite infestation, Trombicula infestation


Introduction

  • Cause: larvae of Neotrombicula autumnalis  Neotrombicula autumnalis.
  • Signs: facial and pedal pruritus in summer and autumn; orange mites seen with naked eye.
  • Treatment: many antiparasitic agents effective.

Pathogenesis

Etiology

  • In sensitized individuals there is a hypersensitivity reaction   →   pruritus and self-excoriation.

Predisposing factors

General

  • Outdoor cats which hunt in wooded or grassland areas.

Pathophysiology

  • Larvae parasitize mammalian host   →   local irritation/hypersensitivity .

Timecourse

  • Signs seen seasonally from July to October in Britain.

Epidemiology

  • Neotrombicula autumnalis is a trombiculid mite the adults and nymphs of which are free living Lifecycle: Neotrombicula autumnalis - diagram .
  • Adults live in decaying organic matter in the soil.
  • They are most common on chalky or sandy soil and dislike clay.
  • Parasitic 6 legged larvae are most numerous in the late summer and autumn.
  • Larval mites attach to host skin, dissolving the cuticle with saliva and suck up host tissue fluids.
  • The pinnae, principally Henri's pocket, are a particularly favored area of attachment, as are interdigital webs.
  • Mites detach on molting to the nymphal stage.
  • The complete life cycle takes 50-70 days Lifecycle: Neotrombicula autumnalis - diagram .

Diagnosis

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Treatment

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Prevention

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • White B (2001) Early Trombicula autumnalis infection. Vet Rec 148 (6), 188 PubMed.
  • Hardison J L (1977) A case of Eutrombicula alfreddugesi (chiggers) in a cat. Vet Med Small Anim Clin 72 (1), 47 PubMed.

Related Images

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code