Endoparasites in domestic animals surrounding an Atlantic Forest remnant, in São Paulo State, Brazil.

This research studied the presence of internal parasites in livestock in rural areas surrounding the Morro do Diabo State Park in Brazil, finding a high prevalence of various parasites that can negatively affect the health of the animals and potentially spread to wildlife and humans.

Study Area and Sample Collection:

The study was conducted in the rural area surrounding Morro do Diabo State Park, a significant remainder of the once extensive Atlantic rainforest in Brazil. This ecosystem’s significance and the region’s domestic-animal-wildlife-human interaction made it a prime area for infectious disease research. The researchers sampled numerous types of livestock from ten large properties and seventy-five rural settlements, investigating 197 cattle, 37 horses, 11 sheep, 25 swine, 21 dogs, one cat, and 62 groups of chickens.

• The studied livestock represent both a considerable sample size and a comprehensive cross-section of animals in the area.

Parasite Prevalence and Types:

The study found a high prevalence of endoparasites (internal parasites) across the studied animals. The parasites identified varied depending on the type of animal, indicating potential host-specificity and the importance of understanding different species’ disease ecology under similar geographic location.

• Eimeria spp., a coccidian parasite, was identified in nearly all the hosts except horses, dogs, and cats.
• Giardia cysts, often associated with contaminated water, were detected only in cattle.
• Nematodes, worm-like parasites, were found in high prevalence in pigs, ruminants, and horses.
• Canine-specific parasites such as Ancylostoma, Toxocara and Sarcocystis were found in dogs.
• Chickens were diagnosed with coccidia, as well as Ascaridida and Capillaria spp. These parasites are common in birds, and their presence indicates potential contamination of the environment.

Implications and Management Strategies:

Recognizing these parasites’ presence is essential as they can cause issues such as malnutrition and reproductive disorders in their hosts, impacting productivity and animal welfare. The research suggests that strategies to prevent and control the spread of these endoparasites are necessary for protecting animal and human health in this area. These strategies should consider the complex epidemiology involving domestic and wild animals and humans.

• Implementing practical strategies can limit the potential spread of these parasites to other animals and humans living in this area, ultimately improving local public health.
• Such strategies may include improved hygiene practices, regular deworming programs, and animal or waste management techniques.