Aim: This study aimed to investigate the pathological effects of the infectious bronchitis virus (IBV) on chicken trachea and kidney tissues and also desired to diagnose the virus genome using a molecular tool. Materials and Methods: Twenty trachea and kidney samples collected from one broiler farm contain 10,000 chickens at Tikrit city. The chickens showed signs of gasping and mortality (20%) at early ages (20 days old), the presence of IBV investigated using conventional reverse transcriptase-polymerase chain reaction technique with routine histopathological study to tracheal and renal tissue. Results: Postmortem lesion showed severe respiratory inflammation with abscesses at tracheal bifurcation lead to airway blog. Molecular results showed two genotypes of IBV, one of them not included in primer designer research. The histological study showed different stages of inflammation, degeneration, and necrosis to the renal and tracheal tissues. Conclusion: The respiratory and renal pathological effect of the virus responsible for the symptoms appeared on the affected chicks that caused mortality, with a high probability of presence of a new viral genotype added to the untranslated region.

Fowlpox virus (FPV) is one of the viruses affecting chickens worldwide, causing pathological and economic losses in the poultry industry. Viral lesions are easily recognizable by the eye and usually appear in the featherless areas, especially the head. Moreover, the virus could lead to blindness and mortality in some cases. This study diagnosed the suspected fowlpox cases, identified and classified the causative agent. We also analyzed the differences and similarities of closely related viruses at the neighboring and regional countries. Fifty samples were collected from three locations of Tikrit city from the domesticated chickens, which showed cutaneous lesions. Virus DNA was extracted directly from tissue samples before the nested PCR technique was performed. The virion core protein (P4b) gene is partially sequenced and analyzed with routine histological sectioning. Results showed that the virus causes pock lesions of dermal hyperplasia and hyperkeratosis. Hyperplasia and congestion of the chorioallantoic membrane were also recorded. The study also showed that the DNA of FPV could be extracted directly from animal tissue without further purification. The sequence analysis showed that the FPV was confirmed in all samples clustered in clade A identical with Iranian and Egyptian isolates. In conclusion, this study approved that the virus belongs to the classical dermal type of poxviruses and the short genetic distances between viruses related to closely neighboring countries. We also concluded that the conservative P4b gene included mutation sites that make this gene practical for diagnosing the virus and phylogenetic analysis.

In this study, thirty adult Swiss male mice weighing with an average weight of twenty seven gram were used. The animals were housed in animal house of the college of Veterinary Medicine/ Tikrit University under normal conditions. The whole animals were divided into three groups each of ten mice, and subdivided into two periods (fourteen and twenty eight days), first group considered as control which were administered with distilled water only. The second group was treated with the metronidazole (MTZ) at a dose of 0.37 mg / mouse /day, the third group were administered with the sumac solution of 0.04 ml / mouse / day. All groups were administered orally. Histological technique was performed to study the effect of MTZ and sumac on the tissues of testis in addition of sperm qualification. The study showed that, the second group of (the two periods) represented the absence of the spermatogonia with the presence of leydig cells in the interstitial tissue. The third group demonstrated a histopathological effect on the testicular tissue such as seminiferous tubules. The study of the effect of MTZ and sumac on the proportion of male sperm showed abnormalities, and the effect of the MTZ showed significant (P≤ 0.01) abnormalities in the confirmation sperms compared with the control group and sumac.

In this study, thirty adult Swiss male mice weighing with an average weight of twenty seven gram were used. The animals were housed in animal house of the college of Veterinary Medicine/ Tikrit University under normal conditions. The whole animals were divided into three groups each of ten mice, and subdivided into two periods (fourteen and twenty eight days), first group considered as control which were administered with distilled water only. The second group was treated with the metronidazole (MTZ) at a dose of 0.37 mg / mouse /day, the third group were administered with the sumac solution of 0.04 ml / mouse / day. All groups were administered orally. Histological technique was performed to study the effect of MTZ and sumac on the tissues of testis in addition of sperm qualification. The study showed that, the second group of (the two periods) represented the absence of the spermatogonia with the presence of leydig cells in the interstitial tissue. The third group demonstrated a histopathological effect on the testicular tissue such as seminiferous tubules. The study of the effect of MTZ and sumac on the proportion of male sperm showed abnormalities, and the effect of the MTZ showed significant (P≤ 0.01) abnormalities in the confirmation sperms compared with the control group and sumac.

Infectious bursal disease virus infect wide range of poultry flocks across the word causing variable ranges of economic loses come from direct or indirect mortality through immune suppression by invading of B cell tissues, this study designed to show the effect of oral and ocular inoculated virus collected and processed from infected farms on bursa of fabricia, Thymus gland, bone marrow tissues with monitoring of virus antibody titer before and after age of inoculation (21 day old), the study showed different  degrees of damage varies between tissues including degeneration, necrosis, congestion and edema, the study also showed that the maternal antibodies was high at the first day of hatching and the decrement of antibody titer happen directly after virus inoculation then increase in antibodies titer started gradually after two weeks of inoculation.