Júnior, Carlos Magno Oliveira, Júnior, Hélio Noberto de Araújo, Tertulino, Moisés Dantas, Guerra, Ricardo Romão, Rola, Luciana Diniz, Silva, Alexandre Rodrigues da, Moura, Carlos Eduardo Bezerra de, and Oliveira, Moacir Franco de
Simple Summary: Peccaries are distributed from the southern United States to southern South America. Although they were initially described as being from the pig genus Sus, they are very different. This species is currently being used on commercial farms as a source of animal protein; however, there are no studies about their salivary glands, which are important for digestion and in developing feeding strategies. Thus, this work aims to study the major salivary gland morphology of peccaries during their growth. During growth, the parotid enlarges and the mandibular gland loses weight. Histologically, the parotid has serous production, and the sublingual has mucus production, like most species; however, the mandibular gland produces mucus, unlike other animals, including pigs, which produce seromucous secretion. Histochemically, the parotid produces more acidic mucins than pigs and it undergoes maturation during development; the mandibular, especially the sublingual gland, produces more acidic and basic mucopolysaccharides than pigs. The major salivary glands reacted positively to different lecithins and showed a stronger reaction than in pigs. We conclude that peccaries have a salivary secretion that facilitates the digestion of carbohydrates, improving digestibility and performance. Their biometric characteristics and positive reactions to lecithins facilitate adaptation to foods with antinutritional factors, making them a promising production animal. This work aims to study the major salivary gland morphology of peccaries during their growth. The glands were analyzed using macroscopic description, light microscopy, electron microscopy, histochemistry, and immunohistochemistry. Topographically, the salivary glands resemble other animals, including domestic animals and pigs. During growth, the parotid enlarges and mandibular gland loses weight. Histologically, the parotid has serous production, and sublingual has mucous production, resembles most species, however, mandibular gland produces mucous, unlike other animals, including pigs, which produce seromucous secretion. Histochemically, parotid produces more acidic mucins than pigs and it undergoes maturation during development; mandibular, and especially the sublingual gland, produce more acidic and basic mucopolysaccharides than pigs. The results found with transmission and scanning electron microscopy techniques corroborate the histological and histochemistry findings. The major salivary glands were positive to different lecithins (Com-A, BSA-I-B4, WGA and PNA), which were also more positive than in pigs and sheep. We conclude that collared peccaries have a salivary secretion that facilitates the digestion of carbohydrates, and biometric characteristics and positivity to lecithins that facilitate adaptation to foods with antinutritional factors. [ABSTRACT FROM AUTHOR]