cloaca

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Related to cloacae: Enterobacter cloacae, avian cloaca

cloaca

(klōā`kə), in biology, enlarged posterior end of the digestive tract of some animals. The cloaca, from the Latin word for sewer, is a single chamber into which pass solid and liquid waste materials as well as the products of the reproductive organs, the gametes. Cloacas are found in amphibians, reptiles, birds, and lower mammals; higher mammals have a separate rectal outlet, the anus. The term cloaca is also used for analogous chambers in many invertebrates, such as worms of the phylum NematodaNematoda
, phylum consisting of about 12,000 known species, and many more predicted species, of worms (commonly known as roundworms or threadworms). Nematodes live in the soil and other terrestrial habitats as well as in freshwater and marine environments; some live on the deep
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Cloaca

 

the broadened extremity of the hindgut of some vertebrate animals. The wall of the cloaca is covered with a many-layered epithelium. The ureter, the genital ducts (sperm ducts or oviducts), and the urinary bladder open into the cloaca. It is found in certain cyclostomes (hagfish) and fishes (sharks, skates, dipnoans and pipefish) and in all amphibians, reptiles, and birds. The cloaca is found in mammals of the subclass Prototheria. In other mammals a cloaca is found only in the early embryonic stage of development; it subsequently divides into the urogenital sinus and the terminal part of the rectum, which have separate urogenital and anal openings. In amphibians the urinary bladder is formed from an evagination of the abdominal wall of the cloaca. Allantoides appear in the embryo of amniotes.

cloaca

[klō′ā·kə]
(invertebrate zoology)
The chamber which functions as a respiratory, excretory, and reproductive duct in certain invertebrates.
(vertebrate zoology)
The chamber which receives the discharges of the intestine, urinary tract, and reproductive canals in monotremes, amphibians, birds, reptiles, and many fish.

cloaca

An underground conduit for drainage; a sewer, esp. in ancient Rome.

cloaca

a cavity in the pelvic region of most vertebrates, except higher mammals, and certain invertebrates, into which the alimentary canal and the genital and urinary ducts open
References in periodicals archive ?
subjected to antibiogram were sensitive to a range of antibiotics except, Morganella morganii, (n=2), Enterobacter cloacae (n=2) and Citrobacter freundii (n=1).
The results were specified of thirty samples of Entrobacter cloacae from fishes give positive culture and appeared under the microscope in oil emersion 100x magnification (Picture No1).
cloacae uretilmesi, uriner sistem infeksiyonuna bagli bakteriyemiye bagli olarak menenjit gelistigini dusundurmektedir.
cloacae metaclusters for the delineation of species and subspecies by ANI calculations (online Technical Appendix Figure 2).
cloacae) are highly adept at acquiring resistance genes to all disinfectants, heavy metals, and antibiotics through horizontal gene transfer between different bacteria within the environment; such genes include extended-spectrum beta-lactamases (ESBLs), copper and arsenic resistance systems (the pco and ars operons), and enzymes that hydrolyze cephalosporins (AmpC enzymes) [7,8].
Cloacae and nasal samples from 1800 birds (900 broilers and 900 layers) were collected using sterile swabs.
cloacae, E hormaechei and E asburiae; these studies reported small variations between the species (2).
Percentage (%) (n=191) Escherichia coli 97 50.8 Klebsiella pneumoniae 51 26.7 Pseudomonas aeruginosa 16 8.4 Acinetobacter lwoffi 10 5.2 Enterobacter cloacae 5 2.6 Proteus mirabilis 5 2.6 Staphylococcus aureus 3 1.57 Staphylococcus saprophyticus 2 1.05 Enterococcus faecalis 1 0.52 Streptococcus pyogenes 1 0.52 Table 4: Distribution of Bacterial Isolates among Community and Hospital-Acquired Cases Bacterial Isolate Community- Hospital- Acquired Cases Acquired cases (n=108) (n= 83) No.