Foodie Friday

Foodie Friday: Para-cakes!

Check out these parasite pancakes; pathology never looked so good!

Gotta catch 'em all!

Gotta catch ’em all!

 

These delicious and sometimes deadly delicacies were created by Nathan Shields over at Saipancakes. Head over for more inspired edibles!

Advertisements
Standard
What's this?

What’s this #7? Lungworm

Last week we asked what (and where) this was in a dog. Fido has a friend very close to his heart, as realised by commenter Grae — the answer is Angiostrongylus vasorum (lungworm), in the pulmonary arteries which supply the lung.

Not a happy lung

Not a happy lung

You can see the damage caused to the lungs by the larvae of lungworm.  There are immature lungworm larvae (black arrow) in the alveoli (lung air sacs; the white spaces), red blood cells where the lung is bleeding (red arrow), macrophage cells clearing up red blood cells by eating them (yellow arrow), thrombi (clots) in the blood vessels (white arrow), and multinucelated giant macrophages (blue arrow) trying to clear up all of the mess!  All this leaves very little room for actual air.

The damage caused by lungworm larvae in the lungs

The damage caused by lungworm larvae in the lungs; what a fracas!

The lungworm is a parasite which lives in slugs and snails for part of its life-cycle.  Foxes are the natural host, but dogs can be infected too. When a dog eats the slug or even licks the slimy trail (yum!), the lungworm begins a new part of its life-cycle by transforming, boring through the gut wall and traveling in the bloodstream to the pulmonary arteries which leave the heart. The worms lay eggs into the lungs, and these are coughed up, swallowed, and passed with the faeces. Lungworm larvae hatch and infect new slugs and snails, and the cycle begins again!

Sometimes the larvae get lost in the bloodstream, and end up reaching other organs by accident (so commenter Reno Hates Me was almost right!).  This is a dead-end for the larvae, and not great for the organs they’re trapped in either — a lose-lose situation for everyone involved! In this case lost larvae were found in the kidney, squashing the filtration units (glomeruli).

Cross sections through lungworm larvae (black arrow) in the kidney

Cross sections through lungworm larvae (black arrow) in the kidney

In dogs, the symptoms of lungworm infection are often subtle and chronic; usually a mild cough, some breathlessness, and weight loss. However, sometimes lungworm is associated with sudden and life-threatening illness. Lungworm can interfere with normal blood clotting, leading to widespread internal bleeding. Heart failure can be a risk if there are many worms clogging the arteries, and rarely they can cause paralysis and seizures.

Brain haemorrhage squashing the left side of the brain

A bleed in the brain has squashed the left side

So remember to worm your pets and poop-scoop! Avoid slug bait to get rid of slugs and snails, since the metaldehyde they contain is toxic to pets — stick to throwing them at the neighbour’s prize petunias instead.

Standard
What's this?

What’s this? #6 Adenocarcinoma in a Chicken

Well done to Alicia D and Tom, who realised this photo was from a chicken.

Adenocarcinoma in a chicken

Adenocarcinoma in a chicken

Adenocarcinomas are tumours arising from glandular tissue.  They are fairly common tumours in chickens, usually forming within the ovary and spreading through the body cavity. The nodular growths of tumour can be seen over the surface of the intestines, caeca and ventriculus (stomach).

Standard
Cases

Extra toes!

Are cats evolving opposable thumbs??? (More pictures here)

Cat with opposable thumbs!?

Cat with opposable thumbs!?

Probably not.  Polydactyly is a condition where extra fingers and/or toes develop in animals.  Sometimes they are fully formed, sometimes they just form a small under-developed finger-like lump.  Usually there is a genetic defect that causes the extra digits, but it has been associated with the mother taking some types of medications at particular points during pregnancy.

Extra fingers and toes with near-normal anatomy in a human.

Extra fingers and toes with near-normal anatomy in a human.

220px-Polydactyly_01_Lfoot_APPolydactyly can occur in many species, and is sometimes associated with other abnormalities such as limb deformities and heart problems.  It may cause no problem at all, and can assist with mental arithmetic.

Polydactyly in a chicken.

Polydactyly in a chicken.

 

Standard