Relationship between Psoroptes cuniculi and the internal bacterium Serratia marcescens

The bacterium Serratia marcescens isolated from surface-sterilised Psoroptes cuniculi was found sensitive to the antibiotic Amikacin. Mites placed in this antibiotic for 48-72 h and then washed by centrifugation were found to be alive and S. marcescens-free. Two experimental infestations were undert...

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Bibliographic Details
Published in:Experimental & applied acarology 2005-09, Vol.36 (3), p.199-206
Main Authors: Perrucci, S, Rossi, G, Fichi, G, O'Brien, D.J
Format: Article
Language:English
Subjects:
Amikacin - pharmacology
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Anti-Bacterial Agents - pharmacology
aposymbiotic mites
Autoecology
bacteria
Biological and medical sciences
Centrifugation
disease transmission
ears
Eggs
endosymbionts
Fundamental and applied biological sciences. Psychology
Host-Parasite Interactions
host-parasite relationships
infection
Larvae
Lesions
Mite Infestations - parasitology
Mites
Protozoa. Invertebrata
Psoroptes cuniculi
psoroptic mange
Psoroptidae
Psoroptidae - drug effects
Psoroptidae - microbiology
Psoroptidae - physiology
Rabbits
Serratia marcescens
Serratia marcescens - drug effects
Serratia marcescens - physiology
skin lesions
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Description
Summary:The bacterium Serratia marcescens isolated from surface-sterilised Psoroptes cuniculi was found sensitive to the antibiotic Amikacin. Mites placed in this antibiotic for 48-72 h and then washed by centrifugation were found to be alive and S. marcescens-free. Two experimental infestations were undertaken in order to verify the ability of the S. marcescens-free mites to infect and to give ear skin lesions in healthy rabbits and to evaluate the differential ability of the S. marcescens-free and S. marcescens-infected mites to give ear skin lesions. All rabbits were found to be infested, but only rabbits infested with S. marcescens-free mites presented crusts in their ears, whereas mites and/or eggs were only detected in the ear cerumen of all rabbits infested with S. marcescens-infected mites. S. marcescens was isolated only from P. cuniculi mites taken from these latter rabbits. Results indicate that P. cuniculi mites do not need S. marcescens to live and to be able to infest a healthy rabbit. In addition, S. marcescens was not isolated from eggs and newly born larvae of S. marcescens-infected P. cuniculi, demonstrating that in a population of P. cuniculi this bacterium is not transmitted transovarially.
ISSN:0168-8162
1572-9702
DOI:10.1007/s10493-005-4511-5