I'm a Prof. Dr, of Veterinary Pathology, works at Faculty of Veterinary Medicine, Cairo University.
Free-living birds, including migratory and non-migratory species, constitute an issue of major interest to many scientists and public because they can act as long-distance vectors for a wide range of microorganisms that could be transmissible to humans, animals, and poultry. The present study aimed to give a spotlight on the pathological affections that could be found in free flying resident pigeons (Columba livia var domestica) and their potential role in transmitting viral, bacterial and parasitic pathogens to various livestock in Egypt as well as to illustrate the zoonotic importance of this species of birds. The study was conducting on fifty apparently healthy wild pigeons collected from non-urban areas (6th of October city and 10th of Ramadan city) in Egypt during the period of the hunting season from September, 2015 to July, 2016. Birds were kept for 24hrs in the laboratory during which thorough clinical examination was carried out. After scarification; tracheal and cloacal swabs were collected as well as tissue specimens from various internal organs. The observed pathological lesions were numerous with variable incidences in different body organs; the prevalence and scoring of which were allocated. Bacteriological examination revealed isolation of E. coli O157, Klebsiella, Enterobacter, Citrobacter, Shigella and Pseudomonas as a single or as a mixed infection. While virological examination revealed isolation of H9N2 and PPMV-1 from all birds. It was concluded that wild pigeons could play an important role in transmitting some bacterial and viral pathogens to human, poultry farms and other live stocks.
Abstract: Primary structure of hemoglobin of α-chain ofColumba livia is presented. The separation of α-chain was obtained from globin by ion-exchange chromatography (CMC-52) and reversed-phase HPLC (RP-2 column). Amino acid sequence of intact as well as tryptic digested chain was determined on gas-phase sequencer. Structure is aligned homologously with 21 other species. Among different exchanges, positions α24 (Tyr→Leu), α26 (Ala→Gly), α32 (Met→Leu), α64 (Asp→Glu), α113 (Leu→Phe), and α129 (Leu→Val) are unique to pigeon hemoglobin. The various exchanges in α-chain are discussed with reference to evolution and phylogeny. The results show that the order Columbiformes is evolutionarily closer to the order Anseriformes. Since the pigeon is homogeneous, having HbA (αA-chain) and lacks αD-chain, its phylogenetic placement could be established among birds having single hemoglobin components.
Pub.: 01 Oct '89, Pinned: 08 Aug '17
Abstract: Birds are frequent sources of emerging human infectious diseases. Viral particles were enriched from the feces of 51 wild urban pigeons (Columba livia) from Hong Kong and Hungary, their nucleic acids randomly amplified and then sequenced. We identified sequences from known and novel species from the viral families Circoviridae, Parvoviridae, Picornaviridae, Reoviridae, Adenovirus, Astroviridae, and Caliciviridae (listed in decreasing number of reads), as well as plant and insect viruses likely originating from consumed food. The near full genome of a new species of a proposed parvovirus genus provisionally called Aviparvovirus contained an unusually long middle ORF showing weak similarity to an ORF of unknown function from a fowl adenovirus. Picornaviruses found in both Asia and Europe that are distantly related to the turkey megrivirus and contained a highly divergent 2A1 region were named mesiviruses. All eleven segments of a novel rotavirus subgroup related to a chicken rotavirus in group G were sequenced and phylogenetically analyzed. This study provides an initial assessment of the enteric virome in the droppings of pigeons, a feral urban species with frequent human contact.
Pub.: 12 Sep '13, Pinned: 08 Aug '17
Join Sparrho today to stay on top of science
Discover, organise and share research that matters to you