Study on Lice Infestation in Hens in Cage-Free Laying Systems and Its Relevance to Other Infestations.
A recent study conducted by the University of California, Riverside, has revealed that laying hens in cage-free systems, such as floor and aviary systems, have a significantly higher risk of lice infestations compared to hens kept in conventional cage systems. This finding confirms what many in the poultry industry already suspected: the freedom of movement and increased contact between birds in these systems heighten the likelihood of parasite transmission.
Key findings of the study.
The study focused on comparing hens raised in cage-free systems with those in conventional cages, finding that the former were more likely to suffer from lice infestations. These infestations not only cause discomfort in the birds but can also affect their egg production performance, as well as cause stress and damage to their plumage.
One of the main reasons for this difference is the environment in which the birds are raised. In cage-free systems, hens have greater freedom of movement and more contact with each other, which facilitates the transmission of parasites such as lice. Additionally, access to areas with dust and natural substrates, while beneficial for the birds’ natural behavior, can increase the risk of infestations if hygiene conditions are not adequately managed.
Use of technology: The “Fitbit for chickens”.
To conduct this study, the research team used an innovative technology nicknamed the “Fitbit for chickens.” This device, similar to activity trackers used by humans, allowed scientists to monitor the behavior of hens in real-time. The sensors detected key activities such as preening and dust bathing, which increase in the presence of lice and other parasites like red mites. This technological approach provided precise data on behavioral patterns related to infestations.
Relevance to other infestations.
Although the study focused on lice, the results and implications could be equally relevant for other common infestations in poultry, such as red mites (Dermanyssus gallinae). Like lice, red mites thrive in environments where birds have more contact and where hygiene is more challenging to maintain due to the complexity of the housing system.
Red mites are particularly dangerous because they feed on the blood of the birds, causing anemia, severe stress, and, in extreme cases, death. The preventive approach and sanitary management strategies developed to control lice in cage-free systems could, therefore, be adapted to combat red mite infestations, offering a comprehensive solution for poultry health.
This study underscores the importance of effective sanitary management in cage-free laying systems, not only to control lice infestations but also to prevent and manage other infestations like red mites. With the increasing adoption of more open production systems due to concerns about animal welfare, it is essential to develop and implement parasite control strategies that maintain the health and well-being of birds in these environments.
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