| seasonal study of the adrenal gland of some indian avian species. | adrenal glands of eight indian species of birds, namely columba livia, passer domesticus, corvus splendens, acridotheres tristis, acridotheres ginginianus, milvus migrans, francolinus pondicerianus and bubulcus ibis were examined during the sexually active and inactive phases of their annual reproductive cycles. excepting a ginginianus and m. migrans, among members of either sex of the remaining six species the weight of the adrenal gland increases during the period of sexual activity. histologi ... | 1976 | 135472 |
| occurrence of keratinophilic fungi on indian birds. | keratinophilic fungi were isolated from feathers of most common indian birds, viz. domestic chicken (gallus domesticus), domestic pigeon (columba livia), house sparrow (passer domesticus), house crow (corvus splendens), duck (anas sp.), rose-ringed parakeet (psittacula krameri). out of 87 birds, 58 yielded 4 keratinophilic fungal genera representing 13 fungal species and one sterile mycelium. the isolated fungi were cultured on sabouraud's dextrose agar at 28 +/- 2 degrees c. chrysosporium speci ... | 1991 | 1726608 |
| a possible role of crows in the spread of diarrhoeal diseases in aden. | the indian house crow (corvus splendens) has increased dramatically in number in aden. these birds pollute the environment by dropping their faecal material all over the city. they may accordingly be related to important public health problems. the present work aimed at investigating the possibility that they play a role in the spread of diarrheal diseases. one hundred and fifty crows were collected and their liver, intestine and cloaca examined bacteriologically for enterobacteriaceae and vibri ... | 1991 | 1791416 |
| influence of age and splanchnic nerve on the action of melatonin in the adrenomedullary catecholamine content and blood glucose level in the avian group. | a single intraperitoneal (ip) melatonin injection (0.5 mg/100 g body wt.) caused an increase in norepinephrine (ne) fluorescence and elevation of ne content in newly-hatched pigeons (columba livia), but a reduction of ne fluorescence and depletion of ne content in the adrenal medulla of newly-hatched crows (corvus splendens) after 0.5 h of treatment. in contrast, in adults melatonin caused increase in ne fluorescence and elevation of ne content only in the parakeet (psittacula krameri). half an ... | 1988 | 3249022 |
| inhibition of tissue aryl hydrocarbon (benzo[a]pyrene) hydroxylase by 7,8-benzoflavone in birds. | 1. addition of 7,8-benzoflavone (7,8-bf) inhibited both hepatic and renal constitutive activity of aryl hydrocarbon (benzo[a]pyrene) hydroxylase in vitro for a number of avian species. inhibition of hepatic benzo[a]pyrene hydroxylase was 70-94% in wild pigeon; 46-88% in homing pigeon; 85-93% in house crow; 18-53% in common kite; 56-86% in cattle egret; and for the renal enzyme was 43-84, 52-88, 18-73 and 13-48% respectively. 2. 3-methylcholanthrene treatment of homing pigeons resulted in the ind ... | 1982 | 7136005 |
| epizootology of newcastle disease in indian house crows. | during an investigation into the role of indian house crows (corvus splendens splendens) in the epizootology of newcastle disease, a total of 164 samples from 82 crows were examined. fifteen isolations of newcastle diseases virus were made from 10 birds and one of these was highly pathogenic to chicken. haemagglutination inhibition (hi) tests showed that 38 per cent of these crows possessed antibody to newcastle disease virus. initiation and duration of virus excretion and development of hi anti ... | 1981 | 7340061 |
| isolation of newcastle disease virus from an indian house crow. | | 1998 | 9719846 |
| survey of campylobacter, salmonella and mycoplasmas in house crows (corvus splendens) in malaysia. | house crows (corvus splendens) in selangor, malaysia were examined for the presence of campylobacter species, salmonella species, mycoplasma gallisepticum and mycoplasma synoviae by serology, culture and pcr. for the detection of campylobacter and salmonella species swabs were taken either from the intestine or cloaca. for the detection of mycoplasmas, swabs were taken either from the choanal cleft or trachea for culture and pcr and serum samples were tested by the rapid serum agglutination (rsa ... | 2007 | 17483380 |
| health studies on the indian house crow (corvus splendens). | fifteen indian house crows (corvus splendens) were obtained from a live-trap in dar es salaam, tanzania. two died soon after arrival. the remainder were examined clinically prior to euthanasia. all birds were examined post-mortem and a limited number of laboratory investigations was performed. none of the birds showed significant clinical signs or pathological lesions. lice were found on one. only escherichia coli and proteus spp. were isolated from the rectum. coccidia were detected in three bi ... | 1996 | 18645865 |
| avifauna in the panipat region, haryana (india). | avifaunal study was carried out in the panipat region, haryana (india) at 56 locations. 91 birds species were observed during the study, of which, 39 species were aquatic. house sparrow was found to be dominant followed by bank myna, house crow and indian myna. among the aquatic birds, cattle egret was dominant followed by common pochard, pintail and blackwinged stilt. encounter rates of the birds were related to the dominant indices of each species. species diversity index was found to be 10.25 ... | 2010 | 21114110 |
| dissemination of the multidrug-resistant extended-spectrum β-lactamase-producing escherichia coli o25b-st131 clone and the role of house crow (corvus splendens) foraging on hospital waste in bangladesh. | two hundred and thirty-eight faecal samples from crows foraging on hospital wastes were analysed for extended-spectrum β-lactamase (esbl)-producing enterobacteriaceae. esbl-producing crow isolates were characterized and compared with 31 patient isolates. among the crows, 59% carried esbl producers. these included escherichia coli, klebsiella pneumoniae, raoultella terrigena and enterobacter cloacae harbouring the genes for ctx-m-1, ctx-m-15, ctx-m-55, ctx-m-79, and ctx-m-14. human isolates carri ... | 2015 | 26115863 |
| investigating a crow die-off in january-february 2011 during the introduction of a new clade of highly pathogenic avian influenza virus h5n1 into bangladesh. | we investigated unusual crow mortality in bangladesh during january-february 2011 at two sites. crows of two species, corvus splendens and c. macrorhynchos, were found sick and dead during the outbreaks. in selected crow roosts, morbidity was ~1 % and mortality was ~4 % during the investigation. highly pathogenic avian influenza virus h5n1 clade 2.3.2.1 was isolated from dead crows. all isolates were closely related to a/duck/india/02ca10/2011 (h5n1) with 99.8 % and a/crow/bangladesh/11rs1984-15 ... | 2014 | 24081824 |
| neospora caninum in crows from israel. | a cross-sectional neospora caninum seroprevalence study was performed on free ranging crows (corvus cornix, corvus monedula and corvus splendens) from israel in order to assess their exposure to this pathogen and evaluate their role as potential hosts or as sentinels of infection. using the modified agglutination test (mat) with a cutoff titer of 1:100, 30 out of 183 crows (16.4%) were found to be n. caninum seropositive. positive results were validated and confirmed by the indirect fluorescent ... | 2015 | 26359640 |
| toxoplasma gondii prevalence in israeli crows and griffon vultures. | a cross-sectional toxoplasma gondii seroprevalence study was performed on free ranging crows (corvus cornis, corvus monedula, corvus splendens) and griffon vultures (gyps fulvus) from israel in order to assess exposure to this pathogen in scavenger birds that feed on animal carcasses and their possible role in the epidemiology of toxoplasmosis. using the modified agglutination test (mat) with a cutoff titer of 1:25, 52 of 122 crows (42.6%) and 40 of 101 griffon vultures (39.6%) were found to be ... | 2013 | 22920844 |
| counting with colours? effect of colours on the numerical abilities of house crows (corvus splendens) and common myna (acridotheres tristis). | we conducted several aviary experiments to investigate the influence of colours in quantity judgments of two species of birds; house crow (corvus splendens) and common myna (acridotheres tristis). different quantity (in seven different food proportions) of mealworms were presented nonsequentially to all birds using artificially coloured red mealworms, for experiment 1, and using artificially coloured green mealworms, for experiment 2. both red and green coloured mealworms have no significant eff ... | 2016 | 27688847 |
| the numerical competency of two bird species (corvus splendens and acridotheres tristis). | we conducted a series of experiments to test the numerical competency of two species of birds, corvus splendens (house crow) and acridotheres tristis (common myna). both species were allowed to choose from seven different groups of mealworms with varying proportions. we considered the birds to have made a correct choice when it selected the food group with the highest number of mealworms. our overall results indicated that the common myna is able to count numbers (161 successful choices out of 2 ... | 2014 | 25210590 |
| morphological and histochemical observations on the ovarian surface epithelium during the reproductive cycle of crow (corvus splendens) and myna (acridotheres tristis). | a morphological and histochemical study has been made of ovarian surface epithelium during the sexual cycle of seasonally breeding birds: crow (corvus splendens) and common myna (acridotheres tristis). the surface epithelium is composed of a single layer of compactly arranged columnar and flat cells in the quiescent ovary. it develops numerous villi during the breeding season. the formation of villi has been correlated with the proliferation of cells which are subsequently incorporated into the ... | 1979 | 452956 |
| morphological and histochemical observations on the primordial and early growing oocytes of crow (corvus splendens) and myna (acridotheres tristis). | a morphological and histochemical study has been made of the primordial and early growing oocytes in the ovaries of crow (corvus splendens) and common myna (acridotheres tristis). the primordial oocytes in the myna ovary are loosely arranged in groups or nests, whereas in crow they form compact nests surrounded by highly vascularized connective tissue bands or lie in layers beneath the surface epithelium. the primordial oocytes in both the species are surrounded by flat granulosa cells whose num ... | 1979 | 471889 |
| correlative morphological and cytochemical observations on the nucleoli and nuclear bodies during avian oogenesis. | a correlative morphological and cytochemical study has been made of the nucleoli and nuclear bodies in the growing oocytes of the crow (corvus splendens) and common myna (acridotheres tristis). the nucleoli show morphological and cytochemical changes during oocyte growth, which are described in detail. in young oocytes at diplotene stage, two to six nucleoli, which are attached to condensed diplotene chromosomes, show rna, lysine-rich histones and some non-histones, the proteins contain s-s and ... | 1979 | 390907 |
| mitochondrial genomes of the jungle crow corvus macrorhynchos (passeriformes: corvidae) from shed feathers and a phylogenetic analysis of genus corvus using mitochondrial protein-coding genes. | the complete mitochondrial genomes of two jungle crows (corvus macrorhynchos) were sequenced. dna was extracted from tissue samples obtained from shed feathers collected in the field in sri lanka and sequenced using the illumina miseq personal sequencer. jungle crow mitogenomes have a structural organization typical of the genus corvus and are 16,927 bp and 17,066 bp in length, both comprising 13 protein-coding genes, 22 transfer rna genes, 2 ribosomal subunit genes, and a non-coding control reg ... | 2016 | 26075478 |
| the use of feather as an indicator for heavy metal contamination in house crow (corvus splendens) in the klang area, selangor, malaysia. | the klang area of peninsular malaysia has experienced rapid industrial growth with intense activities, which can increase the concentration of pollutants in the environment that significantly impact on habitats and the human health. the purpose of this study was to determine the levels of selected heavy metals (cu, zn, ni, fe, and pb) in the heart, lung, brain, liver, kidney, muscle tissues, and feathers of house crow, corvus splendens, in klang, peninsular malaysia. house crow samples were coll ... | 2016 | 27541152 |
| differential activation and tyrosine hydroxylase distribution in the hippocampal, pallial and midbrain brain regions in response to cognitive performance in indian house crows exposed to abrupt light environment. | disruption of the cyclic feature of the day-night environment can cause negative effects on daily activity and advanced brain functions such as learning, memory and decision-making behaviour. these functions in songbirds, including corvids, involve the hippocampus, pallium and midbrain, as revealed by zenk (a neuronal activation marker) and tyrosine hydroxylase (th) expressions. th is rate-limiting marker enzyme of the biosynthesis of dopamine, widely implicated in learning and memory. here, we ... | 2016 | 27478138 |
| absence of vancomycin-resistant enterococci among highly esbl-positive crows (corvus splendens) foraging on hospital waste in bangladesh. | vancomycin-resistant enterococci (vre) have emerged as a growing problem in hospitals; however, domesticated animals, poultry, and wild birds are acting as potential reservoirs. there is a knowledge gap in the epidemiology of vre from bangladesh. | 2015 | 26679560 |
| the complete mitochondrial genome of the invasive house crow corvus splendens (passeriformes: corvidae). | the complete mitochondrial genome of the invasive house crow (corvus splendens) was sequenced (genbank accession number: kj766304) using the miseq personal sequencer (illumina, san diego, ca). the mitochondrial genome is 16,962 bp in length, comprising 13 protein-coding genes, 22 transfer rna genes, 2 ribosomal subunit genes and a non-coding control region. the mitogenome structural organization is identical to that of the other corvus species and related genera. the overall base composition of ... | 2016 | 24938087 |
| isospora corvi ray, shivnani, oommen and bhaskaran, 1952 from the common house crow (corvus splendens vieillot) of selangor, peninsular malaysia. | faecal samples of 56 common house crows (corvus splendens vieillot) were collected from the petaling jaya and kelang districts of selangor, peninsular malaysia, and examined for coccidia. intestinal tracts of 8 of the above crows wee histologically examined under light microscopy to determine the site of coccidial infection and the endogenous stages present. fifty three (94.6%) crows had coccidial oocysts morphologically conforming to only one species of isospora in their faeces at the time they ... | 1991 | 1808029 |
| ultrasonic propagation in tissues of the bird corvus splendens vieillot. | | 1987 | 3436647 |
| new records of nematodes in the house crow (corvus splendens vieillot) in asia. | | 1980 | 7427819 |
| bone marrow chromosomes in corvus species (corvidae: passeriformes: aves). | the diploid number of 80 +/- chromosomes has been established for two species of indian crows, viz. corvus splendens splendens viellot, and corvus macrorhynchus culminatus sykes. in addition to the usual macro- and microchromosomes, there exist certain elements in both cases, falling in between the two different size categories of chromosomes. the number of these medium-sized, and of the macrochromosomes, was found to be 6 and 14, respectively, in both species. all chromosomes included in these ... | 1980 | 7471815 |
| seasonal changes in testicular lipids of the crow corvus splendens splendens: cytochemical & biochemical studies. | | 1977 | 614181 |
| are poultry or wild birds the main reservoirs for avian influenza in bangladesh? | avian influenza viruses (aiv) are of great socioeconomic and health concern, notably in southeast asia where highly pathogenic strains, such as highly pathogenic avian influenza (hpai) h5n1 and other h5 and h7 aivs, continue to occur. wild bird migrants are often implicated in the maintenance and spread of aiv. however, little systematic surveillance of wild birds has been conducted in southeast asia to evaluate whether the prevalence of aiv in wild birds is higher than in other parts of the wor ... | 2017 | 28620679 |
| identification of antibodies against hydropericardium syndrome in wild birds. | 1. domestic fowl and free-living birds were examined for the presence or absence of antibodies against hydropericardium syndrome (hps) using an indirect haemagglutination assay. 2. two-hundred and eighty serum samples of commercial (45 broilers, 20 adult layers and 15 fayoumi fowl) and wild birds, including 65 peafowl, 45 pigeons, 10 crows, 30 house sparrows, 10 doves, 15 ducks, 10 parrots and 15 guinea fowl, were collected and examined. 3. the percentage of hps-positive serum samples was 80% in ... | 2013 | 23796117 |
| house crows and the spread of pathogens. | | 2007 | 17720972 |
| seasonal fluctuations in the testicular asymmetry of birds. | a comparative study has been made of the seasonal fluctuations in the testicular asymmetry of the house crow, the common mina, the bank mina, the house sparrow and the roseringed parakeet. their left testis usually attains a larger size and higher weight than the right one. these differences are more pronounced during the breeding seasons. | 1978 | 742415 |
| relationship between pb and cd accumulations in house crow, their habitat, and food content from klang area, peninsular malaysia. | heavy metal pollution has become a global concern due to accumulation in tissue and transferable effects to humans via the food chain. this study focused on monitoring the accumulation of cadmium (cd) and lead (pb) in surface soil and body content: bone, heart, brain, liver, lung, muscle, kidney, feathers, feces, and gizzard contents of house crow corvus splendens in the klang region, malaysia. the results revealed the occurrence of pb and cd in all biological samples from house crows, food cont ... | 2017 | 29282545 |
| constant light environment suppresses maturation and reduces complexity of new born neuron processes in the hippocampus and caudal nidopallium of a diurnal corvid: implication for impairment of the learning and cognitive performance. | periodic day-night environment shapes the temporal pattern in the behaviour and physiology (e.g. 24-h activity-rest and sleep-wake cycles) and the advanced brain function, such as learning, memory and decision making. in a previous study, we showed the abolition of 24-h rhythm in the activity-rest pattern, and an attenuated cognitive performance in diurnal indian house crows (corvus splendens) under constant light (no-night; ll) environment. present study extended this, and investigated ll-induc ... | 2018 | 29229413 |
| light at night affects hippocampal and nidopallial cytoarchitecture: implication for impairment of brain function in diurnal corvids. | our previous studies have shown that light at night (lan) impaired cognitive performance and affected neurogenesis and neurochemistry in the cognition-associated brain regions, particularly the hippocampus (hp) and lateral caudal nidopallium (ncl) of indian house crows (corvus splendens). here, we examined the cytoarchitecture and mapped out the morphology of neurons and glia-neuron density in hp and ncl regions of crows that were first entrained to 12-hr light (ll): 12-hr darkness (ld) and then ... | 2019 | 30288960 |
| illuminated night alters hippocampal gene expressions and induces depressive-like responses in diurnal corvids. | artificial light at night induces circadian disruptions and causes cognitive impairment and mood disorders; yet very little is known about the neural and molecular correlates of these effects in diurnal animals. we manipulated the night environment and examined cellular and molecular changes in hippocampus, the brain region involved in cognition and mood, of indian house crows (corvus splendens) exposed to 12 hr light (150 lux): 12 hr darkness (0 lux). diurnal corvids are an ideal model species ... | 2018 | 30218624 |
| heavy metal accumulation in two synanthropic avian species in sri lanka. | we assessed the levels of pb, cd, and mn in contour feathers of the feral pigeon (columba livia) and house crow (corvus splendens) obtained from five urban/suburban locations across sri lanka, using the aas following wet digestion. our key objectives were to compare accumulation levels in the two avian species with different foraging habits and living in common locations, and to establish baseline information on the presence of these metals in multiple locations in sri lanka with varying levels ... | 2020 | 33030595 |
| experimental infection and pathology of two highly pathogenic avian influenza h5n1 viruses isolated from crow and chicken in house crows (corvus splendens). | we investigated the experimental infection of two highly pathogenic avian influenza h5n1 viruses isolated from crow (a/crow/assam/142119/2008) and chicken (a/chicken/sikkim/151466/2009) in house crows (corvus splendens). both viruses caused infection in crows, where four out of six and three out of six crows succumbed to h5n1 infection within 11 days post challenge by crow and chicken viruses, respectively. the major clinical signs in crows were wing paralysis, circling and torticollis. the viru ... | 2020 | 32985206 |
| live bird markets in bangladesh as a potentially important source for avian influenza virus transmission. | live bird markets (lbm) are important for trading poultry in many developing countries where they are being considered hotspots of avian influenza virus (aiv) prevalence and contamination. an active surveillance for avian influenza virus (aiv) was conducted on four species of lbm birds (chickens, ducks, quails and pigeons) from 10 of the largest lbm in chittagong, bangladesh, and two species of peri-domestic wild birds (house crow and asian pied starling) in their direct vicinity from november 2 ... | 2018 | 29891142 |
| carrion crows (corvus corone corone) fail the mirror mark test yet again. | the mirror mark test is generally considered to be an indicator of an animal's ability to recognize itself in the mirror. for this test, an animal is confronted with a mirror and has a mark placed where it can see the mark only with the help of the mirror. when the animal extensively touches or interacts with the mark, compared with control conditions, the mirror mark test is passed. many nonhuman animal species have been tested, but few have succeeded. after magpies and indian house crows passe ... | 2020 | 32463251 |
| the expression of tyrosine hydroxylase and darpp-32 in the house crow (corvus splendens) brain. | birds of the family corvidae which includes diverse species such as crows, rooks, ravens, magpies, jays, and jackdaws are known for their amazing abilities at problem-solving. since the catecholaminergic system, especially the neurotransmitter dopamine, plays a role in cognition, we decided to study the distribution of tyrosine hydroxylase (th), the rate-limiting enzyme in the synthesis of catecholamines in the brain of house crows (corvus splendens). we also studied the expression of darpp-32 ( ... | 2019 | 30697741 |
| characterization and zoonotic impact of shiga toxin producing escherichia coli in some wild bird species. | wild birds are considered silent vectors of some zoonotic water and food borne pathogens of public health significance. owing to the importance of shiga toxin producing escherichia coli (stec) as the most pathogenic among the emerging diarrheagenic e. coli groups that can infect man; the present study was designed to detect the occurrence of stec among wild birds in egypt. | 2017 | 29062203 |
| azure-winged magpies fail to understand the principle of mirror imaging. | mirror self-recognition (msr) is considered a crucial step in the emergence of self-cognition. the msr paradigm has become a standard method for evaluating self-cognition in several species. for example, eurasian magpies and indian house crows have passed the mark test for self-cognition, whereas efforts to find msr in other corvid species have failed. however, no literature has conducted msr tests on azure-winged magpies, a species of corvids. therefore, the current research aimed to investigat ... | 2020 | 32485232 |
| serological evidence of west nile virus in wild birds in bangladesh. | west nile virus (wnv) is a vector-borne zoonotic disease maintained in a sylvatic cycle involving mosquito vectors and birds. to detect wnv and other flavivirus infections in wild resident and migratory birds, we tested 184 samples from 19 identified species within nine families collected during 2012-2016 from four districts in bangladesh. we tested serum samples for the immunoglobulin g (igg) antibody against wnv using competitive enzyme-linked immunosorbent assay (c-elisa), whereas tracheal an ... | 2020 | 33126740 |
| is current information on organochlorine exposure sufficient to conserve birds in india? | organochlorine compounds (ocs) pose a serious threat towards the wildlife due to their well-known adverse effects. india is the second largest producer of pesticides in asia, with ddt production still ongoing, and is ranked amongst the leading countries of pesticide consumption. however, a significant data gap in avian biomonitoring studies has been identified in asia. the objective of this review is to compile and discuss the available literature on concentrations of organochlorine pesticides a ... | 2018 | 30083996 |
| method for improving the quality of genomic dna obtained from minute quantities of tissue and blood samples using chelex 100 resin. | although genomic dna isolation using the chelex 100 resin is rapid and inexpensive, the dna obtained by this method has a low concentration in solution and contains suspended impurities. the presence of debris in the dna solution may result in degradation of dna on long term storage and inhibition of the polymerase chain reaction. in order to remove impurities and concentrate the dna in solution, we have introduced modifications in the existing dna isolation protocol using chelex-100. we used am ... | 2018 | 29881330 |
| population mitogenomics provides insights into evolutionary history, source of invasions and diversifying selection in the house crow (corvus splendens). | the house crow (corvus splendens) is a useful study system for investigating the genetic basis of adaptations underpinning successful range expansion. the species originates from the indian subcontinent, but has successfully spread through a variety of thermal environments across asia, africa and europe. here, population mitogenomics was used to investigate the colonisation history and to test for signals of molecular selection on the mitochondrial genome. we sequenced the mitogenomes of 89 hous ... | 2018 | 29180719 |
| genetic evolution and transmission dynamics of clade 2.3.2.1a highly pathogenic avian influenza a/h5n1 viruses in bangladesh. | asian lineage a/h5n1 highly pathogenic avian influenza viruses (hpaivs) have been responsible for continuous outbreaks in bangladesh since 2007. although clades 2.2.2 and 2.3.4.2 hpaivs have disappeared since poultry vaccination was introduced in 2012, clade 2.3.2.1a viruses have continued to be detected in bangladesh. in this study, we identified a/h9n2 (n = 15), a/h5n1 (n = 19), and a/h5n1-a/h9n2 (n = 18) mixed viruses from live bird markets, chicken farms, and wild house crows (corvus splende ... | 2020 | 34127940 |