PATHOLOGICAL STUDY ON LARYNGOTRACHEITIS IN LAYERS
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Abstract
A clinical conditions resembling infectious laryngotracheitis were diagnosed amongst 20,000 , 18,000 , 16,000 and 17,500 respectively, 28-30 weeks old, ISA brown layers.
The hens had nasal discharges, moist rales, coughing and gasping. Hemorrhagic mucous was ejected during sneezing, lacrirnation, conjunctivitis with facial swelling with eyes partially or completely" closed.
Postmortum examination of dead and affected hens revealed hemorrhagic tracheitis with thin pseudomembrane formation. The larynx, congested with petechia on mucous membrane, Infraorbital sinus contained clear thick fluid.
Histopathological examination of trachea showed hypertrophy, of epithelial pseudostratification of the mucosal cell surface, extensive hemorrhages and desquamative necrotizing tracheitis with
mononuclear cells infiltration. Multinucleated gaint cells in theciliated epithelium containing round, oval shaped intranuclear A
inclusion bodies. The lamina propiia shows edema, marked‘ congestion with lymphocytic infiltration.A presumptive diagnosis of laryngotracheitis was made.
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Bgust,T.J. and J.S.Guy (1997). Laryngotracheitis In: Disease of poultry 10th ed .Edited by B.W.Calnek, C.F.Hehnboldt,W.M.Ried,
and H.W. Yoder,Jr. pp. 527- 539. Iwoa State University Press.Ames Iwoa, USA.
Crawshaw,G.J. and B.R.Boycott (1982). Infectious laryngotracheitis in peafowl 26:397-401.
Dobson,N.(1935). Infectious laryngotracheitis in poultry Vet.Rec. l5:1467-1471.
Seddon,H.R., and Hart,H.(l936). Infectivity experiments with the virus of ILT of fowls. Aust.Vet.J. 12:13-16.
El-Zeir1,A.,El Awar,E., and Faris,R.(l979). Isolation and identification of avian infectious laryngotracheitis
virus in Lebanon.Avian Dis. 23: 1060-1065.
Tantawi,H.H., El-Batrawi,A.M., Youssef,Y.I. and Fawzia,M.M.(1983). Avian ILT inEgypt. 1. Epidemiology,
virus isolation and identification. Vet.Res.Commun. 10:281- 287.
S7.Saif—Edeirr,A., ., - El—Demerdash,M.Youssef,M.S. and Mousa,S.(1990). Epidemiological studies on some outbreaks of ILT in Upper Egypt. Proceedings of the 2nd Scientific Conference of the Egyptian Vet. Poult.Asso. pp.292—301.
E8.El-Zanaty,K. and Y.F.Ahed.(1995). Natural outbreak of ILT in broiler chickens in Saudi Arabia. Assiut. Vet.Med.J.33:191-196.
Bayer,R.C.,F.H.Bird.,S.D.Musgrave and C.B.Chawan (1974). A simple method of preparation of gastrointestinal
Tract tissues for sacnning electron microscopy.J.Ani.Sci. 38:354-356.
Watrach,A.M.(1962). Intranuclear filaments associated
iwtih ILT virus. Virology 18:324-327.
ipurcell,D.A.(l971). The ultrastructral changes produced by ILT virus in tracheal epithelium of the fowl. Res.Vet.Sci. 12:455-458.
C12.unnigham,C.H.(1963)> A Laboratory Guide Virology. 6”‘ ed. Burgess Publ.Co., Minneapolis, U.S.A. .
Reggi,L.G.,J.R.Brownell, and G.F.Stewart. (1961).
Effect of ILT virus on egg production and quality. Poult.Sci., 40:131-140.
E14.l-Mahadi,M.M., Nafady,A.A., Begawey,M.B.(1989). Experimental studies on ILT in chickens. Archiv fur Experimattelle Veterinarmedizin. 42:840-897.
S15.hihata,A.B.,M.Shakal,A.Ali, and M.Abd Elwahd. (1995). Virological and Pathological studies on arecent isolation of ILT virus in Egypt.Vet.Med.J.,Giza.43:359- 365.
. 16.Mayor,O.Y.(1974). The histopathology of certain common poultry disease UN, FAO,Rome, No.11. B1
.e17.ard,C.W. and B.C.Easterday. (19760). The influence
of the route of adrninstartion of Newcastle disease on host
in
esponse. III—Irnmunofluorescent and histopathological studies. ‘ J .IrIf.Dis. 117:66-70. -
Hitchner,S.B. and P.G.White.(l958). A comparison of embryo and bird Infectivity using five strains of ILTV. Poult.Sci. 37:684-690.
_19. Bagust,T.J.,Calnek,B.W. and K.J.Fahey.(1986). Herpes virus infection in chicken. 3-Reinvestigation of the pathogenesis of ILT in acute and early post-acute respiratory disease.Avian.Dis. 30:179-190.
Snoeyenbos,G.H.,O.M.Olesiuk and C.F,Helmboldt. (1972). Isolation of ILT which produce pneumonitis and air saculitis. Avian.Dis.
:278-284.