Severe Trombiculiasis in Hunting Dogs Infested With Neotrombicula inopinata (Acari: Trombiculidae).

This study records the clinical findings in nine hunting dogs showing systemic illness associated with trombiculids and identifies the mite species involved. In fall, coinciding with the seasonality of mites, all dogs were infested with mites and had been in the risk area (Sierra Cebollera Natural Park, La Rioja, Spain) a few hours before the onset of symptoms. The symptoms included vomiting, anorexia, weakness and lethargy, diarrhea, and even stupor. The clinical picture was fast-acting and potentially fatal. The infestations varied from low to severe. Molecular analysis of mites that fed on the dogs confirmed that they were larvae of Neotrombicula inopinata (Oudemans, Acari, Trombiculidae). This is the first time that N. inopinata has been identified as feeding on dogs and implicated in canine systemic illness associated with trombiculids. In contrast to other chiggers, N. inopinata does not seem to cause dermatitis. Likewise, the clinical and epidemiological similarity between the clinical symptoms we describe herein and the occurrence of seasonal canine illness (SCI) led us to suspect that this illness may be caused by infestation with these mites. The condition could be the consequence of severe infestation from large numbers of feeding mites, especially N. inopinata. Whether or not the cases were due to a severe allergic host response to salivary proteins or the result of the transmission of a new or emerging trombiculid-borne pathogen is not known.

Efficacy of orally administered invermectin against larval stages of Oestrus ovis in sheep.

The efficacy of ivermectin administered orally at a dosage rate of 0.2 mg/kg liveweight against naturally acquired larval infestations of Oestrus ovis in sheep was 100% in a field trial. Ten sheep were free from infestation by first, second and third instar larvae of O. ovis 12 days post treatment, whereas 10 control sheep harboured 37.7 larvae on average, most of them first stage.

Short report: one case of nasal human myiasis caused by third stage instar larvae of Oestrus ovis.

This is a report of a case of human nasal myiasis caused by third instar larvae of the sheep nasal bot fly, Oestrus ovis. Female flies rarely deposit first instar larvae in the eye, nostrils, and external auditory canal of humans, where they usually survive only a few days without further development. One human infestation by third instar larvae of O. ovis has been recorded in an patient infected with human immunodeficiency virus (HIV) in the United Kingdom. Our report describes a new case of nasal myiasis caused by the third instar larvae of the sheep bot fly in a patient without HIV or signs of any other disease.

Canine myiasis by sheep bot fly (Diptera:Oestridae).

We present a case of canine infestation by 3rd instars of Oestrus ovis (L.) in a 10-yr-old cross-bred dog (Collie x German Shepherd) from Fuerteventura, Canary Islands, Spain. This report confirms that this fly can develop in dogs.

[Influence of the nature of the ingested blood on the gonotrophic parameters of Phlebotomus perniciosus under laboratory conditions]. / Influence de la nature du sang ingéré sur les paramètres gonotrophiques de Phlebotomus perniciosus sous conditions de laboratoire.

A laboratory study was conducted about the duration of developmental stages and the productivity connected with the type of blood meal ingested by the female of Phlebotomus perniciosus. The pre-oviposition and egg incubation periods are not affected whatever the blood ingested by the female. The shorter time required to achieve larval development (rabbit) and pupal development (hamster) governs the generation time, shorter than in the other hosts (dog and man). The productivity is greater when blood is ingested from the rabbit and the dog. This is mainly due to the smaller number of eggs retained in females with these hosts.