Occurrence of squamous cell carcinoma in Milchschaf sheep in Uruguay

García, J. Arrazola; Quinteros, C.; Romero, Agustín Ávila; Dutra, Fernando

doi:10.1590/0103-8478cr20170406

Cited by 4 publications

(6 citation statements)

References 14 publications

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“…The diagnoses of SCCs were based on macroscopic and histological examination of the lesions in all cases, which were similar to those described by other authors in different sheep breeds such as Santa Inês and their crosses, Bergamacia (Macêdo et al 2008), Corriedale, Ideal, and Ile de France (Ramos et al 2007). Cases involving the Friesian Milchschaf breed have also been reported in Uruguay (García et al 2018).…”

Section: Discussionsupporting

confidence: 76%

High frequency of cutaneous squamous cell carcinoma in Friesian Milchschaf sheep in Uruguay

et al. 2019

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This study described five cases of squamous cell carcinoma (SCC) in the pinnae, eyelids, and eyes of Friesian Milchschaf sheep from two flocks raised under extensive conditions in Uruguay. The prevalence values for both flocks were 2.12% and 2.53%, respectively. Macroscopically, single or multiple, nodular, verrucous, or plaque-like neoplasms, with occasional ulceration and bleeding, were observed in the affected areas. Histologically, well- and moderately-differentiated SCCs were diagnosed in three and two cases, respectively. The Milchschaf breed is native of Germany, and its individuals present white non-pigmented skin with the face and legs clear of fleece, thus adapted to areas with lower solar radiation. Additionally, in the German breeding systems, animals remain indoors for long periods. The increased exposure time to higher levels of solar radiation of the Uruguayan extensive production systems may be a predisposing factor for the development of SCC in this sheep breed. In Uruguay, there is more solar radiation and the production systems provide less protection against sunlight compared with the German production system. The high frequency of SCC should be considered prior to introducing European breeds with non-pigmented skin in Uruguay and other countries of the region.

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Section: Discussionsupporting

confidence: 76%

High frequency of cutaneous squamous cell carcinoma in Friesian Milchschaf sheep in Uruguay

et al. 2019

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“…------------------------------------------------------------------------------Age A --------------------------------------------------------------------------------~ -------------------------------------------------------------------------------Year------------------------------------------------------------------------------- H and M exhibited better performance than C in all components of reproductive rate, except for F, in which case the latter breed did not differ from H (Table 6). Results for C were similar to those reported by GANZÁBAL et al (2012) and by PAPALEO & HOZBOR (2021), but below those obtained by some producers (SUL, 2009) and also than what has been reported in other researches (CARDELLINO et al, 1992;CARDELLINO, 1981;CARDELLINO et al, 1978;GANZÁBAL, 2014;GANZÁBAL et al, 2001;RAMOS et al, 2021). The results for NLB in M are above those of GANZÁBAL et al (2012).…”

Section: Effectsupporting

confidence: 87%

“…in the distribution and nature of production systems in the country (GANZÁBAL, 2014). In broad terms, there is now a concentration of relatively large flocks of fine wool sheep (mainly Merinos) in the Northwest region, in extensive production systems with little or no pasture improvement.…”

Section: Introductionmentioning

confidence: 99%

Production and economic evaluation of the Corriedale, Highlander and Milchschaf sheep breeds in Southern Uruguay

2023

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Sheep production is expanding among small farmers in Southern Uruguay. Currently, Corriedale and Milchschaf are being used, but not Highlander. However, there is lack of experimental information regarding the relative performance of these breeds. We conducted an experiment where these three sheep breeds were run together at the Southern Regional Centre, located in the region in question. Wool, body, reproductive and lamb growth traits were recorded from 2015 to 2019. Results were used as a basis for the calculation of gross margins for each breed, which we calculated for a range of production and economic scenarios. For scenarios based on the results of the present study Highlander was the best performing breed. If it was assumed to be wool-less, it performed even better. In some scenarios Corriedale performed best, especially when the higher wool price it used to enjoy was assumed. However, fetching such a price in the foreseeable future is unlikely. We concluded that in the absence of wool-less sheep that perform in a manner similar to Highlander or Milchschaf in terms of reproduction and lamb growth, Highlander is currently the best option for small farmers in Southern Uruguay. Until now, Milchschaf has been the recommended breed for the region and production system in question. The recommendation should be reviewed, Highlander should be recommended instead, and the performance of wool-less breeds should be investigated. Results could be applicable to other temperate regions in Latin America where similar production systems exist or may be developed.

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“…The low occurrence of this type of tumor in sheep is probably due to the fact that these animals are slaughtered before they reach middle age, which reduces their probability of developing neoplasms [ 51 ]. Squamous cell carcinoma has been reported in different regions of the world, such as Saudi Arabia [ 35 ], Uruguay [ 52 ], Brazil [ 7 , 13 ], Egypt [ 16 ], and Argentina [ 53 ].…”

Section: Discussionmentioning

confidence: 99%

Neoplasms in Domestic Ruminants and Swine: A Systematic Literature Review

Vasconcelos

Pires

Alves

et al. 2023

Veterinary Sciences

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Background: Due to the limited information and lack of studies on neoplasms in domestic ruminants, i.e., cattle, sheep, and goats, and domestic swine, the objective of the present study was to systematically review the scientific literature to verify the occurrence, type, organ system, and organs most affected by neoplasms in these animals. Methods: The recommendations of the PRISMA methodology were followed for the elaboration of this study. The research consisted of a systematic review of neoplasms in domestic cattle, sheep, goats, and swine. Results: The number of neoplasms found was 1873. The most affected organ system was the integumentary system with 35.0%, followed in descending order by the alimentary system with 16.90%, the hematopoietic system with 13.50%, the special senses (i.e., eyes and ears) with 10.51%, the female and male genital systems with 7.31%, the urinary system with 4.38%, the liver and biliary system with 3.152%, the endocrine glands with 3.91%, the respiratory system with 2.67%, the nervous system with 2.35%, bones and joints with 0.43%, muscles and tendons with 0.37%, the cardiovascular system with 0.21%, and the pancreas with 0.16%. Of the animals with neoplasms studied, cattle were affected in 69.80% of cases, goats in 10.52%, sheep in 10.46%, and swine in 9.18%. In all species, the most frequent neoplasms were squamous cell carcinomas in ruminants, while melanoma was the most frequent in swine. Few studies carried out in slaughterhouses were found, and the existing ones referred to cattle and swine. No data were found on economic losses with carcass condemnation. Conclusions: In view of the above, it is necessary to carry out extensive and detailed studies that provide knowledge about the impact of neoplasms on the production and condemnation of carcasses in domestic cattle, sheep, goats, and swine and the respective risk factors.

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Occurrence of squamous cell carcinoma in Milchschaf sheep in Uruguay

Cited by 4 publications

References 14 publications

High frequency of cutaneous squamous cell carcinoma in Friesian Milchschaf sheep in Uruguay

High frequency of cutaneous squamous cell carcinoma in Friesian Milchschaf sheep in Uruguay

Production and economic evaluation of the Corriedale, Highlander and Milchschaf sheep breeds in Southern Uruguay

Neoplasms in Domestic Ruminants and Swine: A Systematic Literature Review

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