Red mite and mites in guinea fowl: symptoms, control and prevention
The poultry red mite (Dermanyssus gallinae) is a blood-feeding mite that feeds at night and hides in cracks by day — most often around the perches where guinea fowl like to roost. Learn how to recognise it, how to limit an infestation and how to keep treatment records.
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What is red mite in poultry?
The poultry red mite (Dermanyssus gallinae), also called the red mite, is a small external parasite that feeds on the blood of birds. It feeds mainly at night and hides by day in dark cracks: in perch joints, under battens, in wall fissures and in nests. After a blood meal it turns from grey to red — hence the common name. The mite lives in the house rather than on the bird, which is why it is hard to spot during the day when birds are active.
Why are guinea fowl particularly at risk?
Guinea fowl are very keen to roost high up on perches — this is their natural behaviour. Unfortunately, perches and their immediate surroundings are the red mite’s favourite hiding places, because the mite has easy access to the sleeping, motionless birds there. In a house with guinea fowl the parasite therefore finds excellent conditions: many cracks in the wood of the perches and a steady source of blood at night. The more cracks there are and the less often they are cleaned, the faster the infestation grows.
How does red mite harm a guinea fowl flock?
Night-time bites rob the guinea fowl of rest — the birds are restless at night and sleep worse, which shows in their daytime condition. Constant feeding causes itching and, with larger mite numbers, anaemia and pale comb and skin. Weakened birds grow worse and gain less weight, and in laying flocks egg production falls. In a heavy infestation there is clear weakening, and in the youngest or weakest birds blood loss can become dangerous.
How do you detect red mite?
Red mite is easiest to find at night or very early in the morning, while the mites are feeding. It is worth checking the cracks by the perches, looking under battens and into the joints of the wood — clusters of small mites and a grey-black deposit (droppings and skin casts) are often visible there. Simple traps placed by the perches help: mites hide in them during the day, which lets you gauge the scale of the infestation. For an overview of other disease signs see: Poultry diseases — symptom table.
Red mite, hygiene and biosecurity
Red mite spreads easily between houses on equipment, clothing and via wild birds, so controlling it is part of everyday farm hygiene. Cleaning and disinfecting the perches between flocks and sealing cracks make it much harder for the mite to survive. We describe the general rules in: Poultry farm biosecurity, and entry and deliveries in: Vehicle entry and deliveries — biosecurity.
How red mite hits a guinea fowl flock
Each of these signals should prompt the farmer to inspect the perches at night and consult a veterinarian.
Night-time restlessness and poor sleep
Guinea fowl roosting on perches are restless at night, move about and rest poorly. This is often the first sign that red mite is feeding around the perches.
Itching and skin irritation
Mite bites cause itching. Birds preen and scratch more and may avoid the perches where the parasites are most numerous.
Anaemia and pallor
Constant blood loss leads to anaemia. A visible sign is pale comb, wattles and skin, especially with a heavier infestation.
Poorer condition and growth
Sleep-deprived and weakened birds grow worse. In meat birds this slows weight gain and worsens flock uniformity.
Lower egg production
In laying guinea fowl flocks, the stress and weakening caused by red mite translate into a noticeable drop in the number of eggs laid.
Weakness in heavy infestation
With very numerous red mite the flock is clearly weakened, and in the youngest or weakest birds substantial blood loss can be life-threatening.
How to limit red mite and how to act during an infestation
Effective action combines monitoring, perch hygiene and — where needed — products selected by a veterinarian.
Monitoring with traps
Simple traps placed by the perches detect red mite early and gauge the scale of an infestation. Regular trap checks and night inspections of cracks are the basis of an early response.
Cleaning perches and cracks
Thorough cleaning of the perches and their surroundings removes hiding places and mite clusters. Pay particular attention to wood joints, battens and the points where perches meet the wall.
Disinfection and sealing between flocks
The gap between flocks is the best moment to disinfect and seal cracks — especially around the perches. Fewer cracks mean fewer hiding places and a slower return of the infestation.
Products only on the vet’s advice
Control uses mechanical agents (diatomaceous earth, silica) and acaricides. Products are selected and recommended solely by a veterinarian, with the withdrawal period observed before slaughter or before eggs are placed on the market.
Biosecurity and limiting wild birds
Red mite spreads on equipment, clothing and via wild birds. Hygiene, entry control and limiting wild-bird access reduce the risk of introduction. Details: Poultry farm biosecurity.
Treatment records and withdrawal
Every use of a veterinary product must be recorded: date, product, dose, method of use and withdrawal period. DlaFerm.pl lets you keep these records digitally. More: Treatment records and drug withdrawal.
Frequently asked questions about red mite in guinea fowl
What is red mite and why does it affect guinea fowl?add
The poultry red mite (Dermanyssus gallinae) is a blood-feeding mite that feeds at night and hides in cracks by day. Guinea fowl like to roost on perches, and perches and their surroundings are the mite’s favourite hiding places, so it finds good conditions in their houses. That is why guinea fowl flocks can be particularly at risk.
How can you tell there is red mite in the house?add
It is best to check the cracks by the perches at night or early in the morning, while the mites are feeding. Clusters of small mites and a grey-black deposit are often visible there. Traps placed by the perches help to gauge the scale of the infestation.
What symptoms does red mite cause in guinea fowl?add
Typical signs are night-time restlessness and poor sleep, itching, pale comb and skin (anaemia), worse condition and slower growth. In laying flocks egg production falls, and in a heavy infestation the birds are clearly weakened.
How do you limit red mite around the perches?add
The basis is monitoring with traps and thorough cleaning of the perches and their surroundings. Between flocks it is worth disinfecting and sealing cracks, especially in the wood of the perches. Fewer hiding places mean a slower return of the infestation.
Can red mite products be used on your own?add
No. Mechanical agents (diatomaceous earth, silica) and acaricides are selected and recommended solely by a veterinarian. The withdrawal period must also be observed before slaughter or before eggs are placed on the market, so every use of a product should be recorded in the treatment records.
How does DlaFerm.pl help with red mite control?add
DlaFerm.pl enables digital treatment and withdrawal records — the required documentation for every product use. In the Flock Card you can log trap checks, disinfections and flock observations, so the data are available for veterinary inspections.
Sources & resources
- linkMSD Veterinary Manual — Mites of Poultry (Dermanyssus gallinae)
- linkEFSA — scientific opinion on poultry welfare and health
- linkChief Veterinary Inspectorate Poland — information for poultry farmers
- linkNational Veterinary Research Institute — PIWet (Puławy)
- linkWOAH — World Organisation for Animal Health
Keep treatment records with DlaFerm.pl
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