Pagina documente » Medicina » Cercetari etiopatogenetice, imunologice si epidemiologice in raia psoroptica la bubaline

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Cuprins

Cuprins
Abstract 4
Partea I - CONSIDERATII GENERALE ASUPRA RiIEI PSOROPTICE LA BUBALINE 6
Introducere 6
1. Etiologie 7
2. Bioecologia acarienilor din genul Psoroptes 9
2.1. CICLUL EVOLUTIV 9
2.2. REZISTENTA ACARIENILOR iN MEDIUL EXTERIOR 10
2.3. SPECIFICITATEA GAZDEI 12
3. Epidemiologie 13
4. Diagnosticul 15
4.1. DIAGNOSTICUL ANATOMO - CLINIC 16
4.2. DIAGNOSTICUL DE LABORATOR 17
4.3. DIAGNOSTICUL DIFERENTIAL 17
5. Imunologie si imunopatologie in riia psoroptica la bovine 18
6. Combatere 20
Partea II - CERCETARI PROPPRII 25
Capitol 1. 25
1.1. Materiale si metode 26
A. Modul de prelevare si examinarea probelor de cruste 26
B. Identificarea acarienilor 27
C. Scorul lezional 27
D. Examenul histopatologic 27
E. Monitorizarea parametrilor hematologici, serologici si imunologici 28
1.2. Rezultate si discutii 35
1.2.1. Identificarea acarienilor 35
1.2.2. Scorul lezional 38
1.2.3. Examenul histologic 43
1.2.4. Monitorizarea parametrilor hematologici, serologici si imunologici 47
1.3. Concluzii 56
Capitolul 2. Aspecte de epidemiologie descriptiva in riia psoroptica la bubalinele din cadrul S.C.D.C.B. - Sercaia, jud. Brasov (2003-2005) 58
2.1. Materiale si metode 59
2.2. Rezultate si discutii 63
2.3. Concluzii 73
Capitolul 3. Concluzii generale 74
Bibliografie 77

EXTRAS DIN DOCUMENT

?Abstract

The studies between 2003-2005 at SCDCB- Sercaia, Brasov district were conducted in order to establish the evolution of psoroptic mange in buffaloes and regarding this etiopathogenesis, epidemiology and immunology. Psoroptic mange was induced by Psoroptes ovis, with different body measures for males (smaller) and females (bigger) was present in 9,72% (2003-2004) and 6,43% (2004-2005) in the entire heard (257-264 animals) only in adult animals (5-13years). The body regions most affected were: the sacral region, the sacro-coccigian region, the glutean region, the coxal tuberosity region and the dorso -lumbar region.

Histologically, there were identified: crusts, the destruction of the keratin layer; large spaces between the derma layers, congestion and edema in the papillary derma. There more noticed same differences in the leukocyte formula, between the healthy animals (16,8±5,54% eosinophyles) and the infected ones (4,2±2,85% eosinophyles). The globulin values more 4,2 times higher in buffaloes with psoroptes mange, than in the healthy ones.

The serum lysozim was higher in healthy animals (0,68±0,82?g/ml) than in the infected ones (0,3± 0,22 ?g/ml).

The immunodifusion showed a characteristic reaction for one sample from animals with psoroptic mange, when it was used the psoroptes antigen with a quality of proteins of 12,5 mg/ml. In the second faze, the serum from the animals with maximum risk of infestation has induce precipitation when put in contact with the concentrated psoroptic antigen. The lactoserum from adult buffaloes has showed precipitation reactions when put in contact with both types of antigen: concentrated one 1275 mg/ml total protein and the diluted one 2,7 mg/ml total protein.

The descriptive epidemiological analysis of the psoroptic mange in buffaloes from SCDCB Sercaia between 2003-2005 showed that there are 2 categories of animals: with maximal infestation risk - adult animals 5-13 years of age and with minimal infestation risk - the other age range.

Partea I - Consideratii generale asupra raiei psoroptice la bubaline

Introducere

La ora actuala, atat la nivel national, cat si international, se pune un accent deosebit pe cresterea bubalinelor. Acest fapt se datoreaza potentialului biologic al speciei caracterizat prin: longevitate productiva mare (in medie 20 de ani); valorificare buna a resurselor furajere care nu intra in hrana altor specii. Din punct de vedere economic cresterea bubalinelor ofera avantajele calitatii laptelui si a carnii, neexistand restrictii privind exportul acestor produse in Uniunea Europeana (Ministerul Agriculturii, Padurilor, Apelor si Mediului, 2004). Se considera ca bubalinele sunt perfect adaptate conditiilor din Romania, fiind specie rezistenta la factorii climatici, la sistemul de crestere (extensiv, semi-intensiv, intensiv) si la evolutia bolilor.

1. Etiologie

Raia psoroptica este o dermatita pruriginoasa, foarte contagioasa, care evolueaza mai ales toamna si iarna la bovinele crescute si intretinute in adaposturi neigienice, cu exces de umiditate; afecteaza mai ales animalele crescute pentru productia de carne.

Este produsa de paraziti incadrati taxonomic in:

? Îngrengatura Artropoda ;