Listeriosis, Biology

Assignment Help:

Listeriosis

The disease is caused by Listeria monocytogenes - Gram positive small non spore- forming bacilli seen in soil, silage, sewage and feces of animals and birds. These bacteria can survive outside the host for several years but are susceptible to pasteurization and certain antimicrobials. The clinical symptoms are not specific. There is depression, ataxia and torticollis. The gross lesions observed are focal hepatic necrosis, spleenomegaly with military necrosis, nephritis, enteritis, myocarditis and conjunctivitis. In acute cases the only lesion seen are congestion of the viscera and petechial haemorrhages on several organs.

Definite diagnosis is based on isolation and identification of the bacteria from blood, liver, spleen or brain. Isolation may require pre-incubation of the macerated materials at 4oC for several days or weeks. Isolation of the organism can also be attempted in chicken embryos.  Potential source of infection should be avoided with biosecurity measures.


Related Discussions:- Listeriosis

Describe the initiation of visual impulse, Describe the Initiation of Visua...

Describe the Initiation of Visual Impulse When light falls on the retina it is absorbed by the photosensitive pigments of rods (rhodopsin) and cones (photopsin). It initiates

What are four initial stages of the embryonic development, Q. What are the ...

Q. What are the four initial stages of the embryonic development? The four early stages of the embryonic development are the blastula stage, the morula stage, the gastrula stag

Explain adverse effects of ganciclovir, Explain Adverse Effects of ganciclo...

Explain Adverse Effects of ganciclovir Ganciclovir is teratogenic, carcinogenic and mutagenic and causes aspermatogenesis in animals. Granulocytopenia and thrombocytopenia, whi

Explain fungal infections, Fungal Infections Intravenous infusion of am...

Fungal Infections Intravenous infusion of amphotericin B deoxycholate  frequently causes fever and chills, and sometimes headache, nausea, vomiting, hypotension and tachypnea,

Termination and follow-up in diabetes mellitus, Q. Termination and Follow-u...

Q. Termination and Follow-up in diabetes mellitus? After plan is implemented, you have to assess the progress. Slowly start winding up the contact with the client and the famil

How is claimant need to make balance of probability, How is claimant need t...

How is claimant need to make balance of probability? When there is no loss suffered through a person after that there cannot be a civil proceeding not like under criminal law t

What are biopolymers, What are biopolymers? Polymers are macromolecule...

What are biopolymers? Polymers are macromolecules made by the union of various smaller identical molecules, called monomers. Biopolymers are polymers present in the living bei

Tunnel subvalvar stenosis, Tunnel Subvalvar Stenosis :  This variety ...

Tunnel Subvalvar Stenosis :  This variety is less common and extends from sub aortic area for a variable length of 10-30 mms (tunnel stenosis). In the severe variety, the tun

Counselling elderly diabetics, Q. Counselling Elderly Diabetics? The ri...

Q. Counselling Elderly Diabetics? The rising trend of diabetes in the elderly population is a challenge for health care providers. The problems which make the diabetes treatmen

Sour taste, Sour taste is usually due to the presence of acids such as acet...

Sour taste is usually due to the presence of acids such as acetic acid, citric acid, benzoic acid. Upon dissociation, the acids give H ions which impart acidity. More the H ion con

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd