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Prevalence of Bacteria and Parasites in White Ibis in Egypt Maha E

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Prevalence of Bacteria and Parasites in White Ibis in Egypt Maha E Veterinaria Italiana, 46 (3), 277‐286 Prevalence of bacteria and parasites in White Ibis in Egypt Maha E. Awad‐Alla(1), Hanan M.F. Abdien(2) & Amina A. Dessouki(2) Summary Keywords A field survey was conducted to evaluate the Bacterium, Egypt, Ibis, Nipponia nippon, prevalence of bacterial infections among free‐ Parasite, Pathogen, Poultry, White Ibis. living White Ibis (Nipponia nippon) in which 92 bacterial isolates were recovered from Prevalenza di batteri e parassiti 193 different internal organs of 55 apparently healthy Ibis. Escherichia coli and Salmonella spp. nell’ibis bianco in Egitto were isolated at rates of 43.6% and 14.5%, Riassunto respectively. The other bacterial pathogens E’ stata condotta un’indagine di campo su 55 bis isolated were Shigella spp. (34.5%), Enterobacter bianchi (Nipponia nippon), allo stato libero e spp. (21.8%) Citrobacter spp. (18.1%), Klebsiella apparentemente sani, per valutare la prevalenza di pneumonia (16.3), Staphylococcus aureus (10.9%) infezioni batteriche. Sono stati effettuati 92 solati and Proteus mirabilis (7.2%). The antibiogram batterici da 193 rgani interni. Sono stati rilevati indicated that all isolates were highly sensitive Escherichia coli e Salmonella spp., rispettiva‐ to ciprofloxacin, enrofloxacin, trimethoprim mente, nel 43,6% e 14,5% degli isolati. Sono stati and penicillin. Penicillin was most effective rilevati altri agenti patogeni batterici: Shigella spp. against S. aureus. An examination of the (34,5%), Enterobacter spp. (21,8%), Citrobacter gastrointestinal tract revealed the presence of a spp. (18,1%), Klebsiella pneumonia (16,3), nematode, Ascaris (Porroceacum ensicaudatum), Staphylococcus aureus (10,9%) e Proteus and three trematodes (Echinochasmus perfoliatus, mirabilis (7,2%). L’antibiogramma ha permesso di Apatemon aracilis and Patagifer bilobus). Other rilevare l’alta sensibilità di tutti gli isolati a trematodes were detected in enlarged gall ciprofloxacina, enrofloxacina, trimetoprim e bladder and kidney lesions. Histopathological penicillina. In particolare, la penicillina è risultata examination showed signs of hepatitis. The il farmaco, tra quelli impiegati, più efficace contro gall bladder had cholangitis, cholicystitis S. aureus. L’esame del tratto gastro‐intestinale ha which may have been caused by trematode dimostrato casi con presenza di un nematode infestation. The kidneys also showed multiple Ascaris (Porrocaecum ensicaudatum) e parasitic cysts of trematodes and non‐ 3 trematodi (Echinochasmus perfoliatus, suppurative interstitial nephritis. This study Apatemon gracilis e Patagifer bilobus). Altri suggests the possible role of the White Ibis, trematodi sono stati individuati in cistifellea when living near poultry populations, in dilatata e lesioni renali. L’esame istopatologico ha transmitting certain pathogens to poultry. mostrato casi con segni di epatite e casi di colangite e colecistite della cistifellea determinati da trematodi. I reni hanno mostrato molteplici cisti parassitarie di trematodi, è stato evidenziato un (1) Diagnostic Laboratory Veterinary Hospital, Faculty of Veterinary Medicine, Zagazig University, 44519 Zagazig City, Sharkia Province, Egypt [email protected] (2) Department of Poultry and Rabbit Medicine, Pathological Department, Faculty of Veterinary Medicine, Suez Canal University of Egypt, 41522 El-Shik Zaid, Ismalia Province, Egypt © Istituto G. Caporale 2010 www.izs.it/vet_italiana Vol. 46 (3), Vet Ital 277 Prevalence of bacteria and parasites in White Ibis in Egypt Maha E. Awad‐Alla, Hanan M.F. Abdien & Amina A. Dessouki caso di nefrite interstiziale non suppurativa. Little is known about the incidence of these Questo studio ribadisce il possibile ruolo dell’Ibis enteropathogens in wild birds that live near bianco, presente nelle aree limitrofe agli allevamenti poultry facilities and their possible trans‐ avicoli, nella trasmissione di determinati agenti mission to domestic poultry. The objective of patogeni al pollame. this survey was to determine the prevalence of common avian pathogens in apparently Parole chiave healthy free‐living White Ibis and to test drug Agente patogeno, Batterio, Egitto, Ibis bianco, susceptibilities. Nipponia nippon, Parassita, Pollame. Introduction Materials and methods The spread of certain bacterial pathogens and Birds their persistence in the environment may be For the survey, 55 apparently healthy White facilitated by wild birds which, in view of their Ibis were hunted in different areas of the mobility and possible carrier state, have been Sharkia Province of Egypt. identified as a possible reservoirs or sources of Necropsy and sampling bacterial infections to domestic poultry (3, 4). Birds were examined clinically and subjected The world population of White Ibis (Nipponia to post‐mortem examination. The specimens nippon) has increased significantly since 1983 (heart blood, lung, liver, spleen, kidney and and these birds are frequently observed in ovaries) were taken using aseptic techniques close contact with people (22). This has led to for bacteriological and histopathological concern that Ibis may transmit pathogens that investigations. threaten not only the poultry industry, but also public health. The prevalence of different Bacteriological examination bacterial isolates in White Ibis was Samples were inoculated in nutrient broth and documented by the isolation of Pseudomonas, brilliant green bile broth and incubated at 25°C Escherichia coli, Salmonella, Proteus and and 37°C for 24 h. They were subsequently Pasteurella haemolytica (23). In another study, subcultured into differential and specific the same pathogens were isolated in addition media, such as eosin‐methylene blue (EMB) to Streptococcus faecalis, Arizona hydrophila and agar, xylose‐xysine‐deoxy‐cholate (XLD) agar, Staphylococcus aureus. (5). E. coli was isolated MacConkey agar, brilliant green bile agar, from different internal organs in six septicaemic Mannitol salt agar and nutrient agar. The cases of young Crested Ibis (Bubulcus ibis) (28). inoculated plates were incubated at 37°C for E. coli and Salmonella spp. were isolated from 24 h. Colonies with characteristic growth of free‐living passerines (25). Salmonella spp. has any bacteria were phenotypically identified by also been reported in free‐living wild birds (3, using Gram stain and standard biochemical 4, 6, 20, 24, 27). tests (18). The tests included lactose ferment‐ ation, indol production, the methyl red test, Salmonella spp. has commonly been observed use of citrate, presence of urease, hydrogen in the intestines of wild birds which appear to sulphide gas production, the Voges‐Proskauer be relatively resistant to salmonellosis but may test for the production of acetoin and the serve as effective carriers of Salmonella by motility test. shedding the organism in their faeces and could to be a source of infection for domestic Antimicrobial sensitivity test poultry (26). All isolates were subjected to disc sensitivity The upper respiratory tract of healthy birds tests according to the procedure given by the can harbour the Klebsiella micro‐organism, National Committee for Clinical Laboratory which acts as an opportunistic pathogen and Standards (NCCLS) (16) using available causes localised or systemic infection in commercial antibiotic discs (Oxoid Laboratory, poultry and other birds (1). Oxoid, Unipath Ltd, Basingstoke). The diameter 278 Vol. 46 (3), Vet Ital www.izs.it/vet_italiana © Istituto G. Caporale 2010 Maha E. Awad‐Alla, Hanan M.F. Abdien & Amina A. Dessouki Prevalence of bacteria and parasites in White Ibis in Egypt of inhibition zones were measured in Records of bacterial isolations from 55 White millimetres after 24 h of growth and the inter‐ Ibis and the recovery from different organs are pretation chart provided by the manufacturer presented in Tables I and II. was used to classify isolates into ‘sensitive’ or ‘resistant’ groups. Table I Parasitological examination Frequency* of different bacterial pathogens Examination of the gastrointestinal tract of Ibis isolated from 55 wild Ibis was performed to detect different enteric Number Percentage Bacterial isolates parasites. Faecal samples were collected in positive (%) clean sterile containers. Some of the sample Escherichia coli 24 43.6 was fixed in 10% formalin, followed by direct Salmonella 8 14.5 concentration and centrifugation in saturated Shigella 19 34.5 salt solution. Gross helminths passed in faeces Proteus 4 7.2 were identified after staining with borax Citrobacter 10 18.1 carmine in the case of trematodes and Enterobacter 12 21.8 cestodes. Nematodes were studied after Klebsiella 9 16.3 clearing them in lactophenol according to Staphylococcus 6 10.9 standard procedures (17). Total 92 Histopathological examination * mixed infection was observed in certain cases Specimens showing characteristic lesions were collected from the liver, gall bladder and kidneys; they were fixed in 10% neutral The highest percentage of bacterial isolation buffered formalin solution and embedded in was recorded for E. coli (43.6%) followed by paraffin wax. Then 5 μm sections were Shigella (34.5%), Enterobacter (21.8%), Citrobacter prepared and stained with haematoxylin and spp. (18.1%), Klebsiella pneumonia (16.3%), eosin (H&E) for microscopic examination (2). Salmonella (14.5%), S. aureus (10.9%) and Proteus mirabilis (7.2%). A high rate of recovery Results and discussion was from lungs, heart blood and liver. E. coli 078 (33.3%), Salmonella enterica Although the hunted white Ibis appeared Typimurium
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