Analiza povezav med telesno maso, stanjem nastila ter pojavnostjo dermatitisa na prsih in stopalih v komercialnih jatah pur v Sloveniji

Podbevšek, Nina (avtor), Terčič, Dušan (mentor)

Namen te študije je bil ugotoviti pojavnost dermatitisa na prsih in blazinicah stopal v devetih slovenskih komercialnih jatah pitovnih pur ter ugotoviti možne dejavnike, ki vplivajo na pojavnost in izraženost kontaktnega dermatitisa: genotip, spol, reja, starost in kakovost nastila. Reja provenienc Aviagen BUT Big-6 in Hybrid Converter je potekala v zaprtih hlevih nastlanih z lesnimi oblanci. Nekatere podatke smo pridobili na farmah, druge so nam posredovali iz klavnice, kjer je potekalo klanje teh pur. Pri vsakem od šestih obiskov posamezne reje in sicer pri starostih 2., 4., 6., 9., 12. in 18. tednov smo zagradili naključni vzorec živali, jih individualno stehtali in ocenili stopnjo poškodb zaradi kontaktnega dermatitisa na blazinicah stopal (KDBS). Ob vsakem obisku smo ocenili tudi kakovost nastila v hlevu. Zdravje kože na nožnih blazinicah, kategorizacijo prsnih žuljev in kakovost nastila smo ocenjevali s 3-točkovo lestvico, pri čemer je najvišja ocena pomenila stopalo brez poškodb zaradi KDBS, prisotnost velikih žuljev na prsih oziroma v primeru nastila suh, nezaskorjen nastil. Pri vseh tehtanjih so bili purani težji (p0,0001) od puric in pure genotipa Aviagen BUT Big-6 težje (p0,0001) od pur genotipa Hybrid Converter. Ugotovili smo povezavo med telesno maso živali in kakovostjo nastila, na katerem so bile te uhlevljene. Pure, nastanjene na zaskorjenem nastilu (ocena 1) so tehtale manj kot pure, ki so bile vhlevljene na nastilu srednje kakovosti (ocena 2) oziroma na suhem, nezaskorjenem nastilu (ocena 3). Na stopnjo izraženosti KDBS so vplivali starost živali (p0,0001), kakovost nastila (p=0,0004) in reja (p=0,03), ne pa tudi genotip (p>0,05). Značilno večjo stopnjo poškodb povezanih s KDBS smo ugotovili v jatah nastanjenih na nastilu ocenjenem z 1 in 2 kot na suhem, nezaskorjenem nastilu (ocena 3). Resnost poškodb zaradi KDBS se je stopnjevala s starostjo živali. Na liniji klanja je bila manjša prevalenca prsnih žuljev in manjši delež živali s poškodbami zaradi KDBS ugotovljen pri puricah kot pri puranih. Iz posameznih rej je bilo v klavnico pripeljanih od 47,5% do 87,5% živali s KDBS.

• Jezik: Slovenski jezik
• Ključne besede: perutninarstvo, pure, reja, telesna masa, nastil, kontaktni dermatitis
• Vrsta gradiva: Magistrsko delo/naloga
• Organizacija: BF - Biotehniška fakulteta
• Leto izida: 2018
• PID: 20.500.12556/RUL-104065
• COBISS.SI-ID: 4126344
• Datum objave v RUL: 04.10.2018

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: Analysis of relationship of body weight and litter condition to prevalence of breast and foot pad dermatitis in Slovenian commercial fattening turkey flocks

Izvleček

The aim of this study was to determine the prevalence of breast and foot pad dermatitis in nine Slovenian fattening turkey commercial flocks and to identify possible factors affecting the incidence and severity of contact dermatitis: genotype, sex, farm, age and litter condition. Flocks of Aviagen BUT Big-6 and Hybrid Converter were kept in environmentally controlled houses littered with wood shavings. Some of the data were collected on the farms and some at the processing plant. During each of six visits at the ages of 2, 4, 6, 9, 12 and 18 weeks, randomly selected samples of animals were individually weighed and scored for foot pad dermatitis (FPD). At each visit litter quality score was also recorded. Foot pad health, severity of breast blisters and litter quality were scored on 3-point scale where highest score represented feet having no lesions, breast having big lesion and dry, no caked litter. In all weighings males were heavier (p0.0001) than females and turkeys of genotype Aviagen BUT Big-6 were heavier (p0.0001) than turkeys of genotype Hybrid Converter. We observed body weight to be associated with litter condition. Turkeys on caked litter (score 1) exhibited lower body weight compared with when on litter of medium quality (score 2) and dry, no caked litter (score 3). The FPD severity was affected by the age (p0.0001), litter quality (p=0.0004) and farm (p=0.03), but not by the genotype (p0.05). A significantly higher severity of FPD was found in flocks reared on litter scored with 1 and 2 than on dry, no caked litter (score 3). Severity of FPD increased over time. Female turkeys exhibited lower prevalence of breast blisters and lower rate of lesions due to FPD compared to males as measured at processing plant. The flocks mean percentages of FPD at time of slaughter found in this study ranged from 47.5% to 87.5%.

• Ključne besede: poultry breeding, turkeys, body weight, litter, dermatitis