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Chickens, snails and earthworms – Daily Nation

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By DR JOSEPH MUGACHIA
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Some seemingly harmless creatures on your farm will often spring surprises when it comes diseases or even the death of your livestock.

Today, I narrate an enquiry from Mbinji of Vihiga County. He narrated on phone that he has been seeing his mother’s rural free-range chicken happily eat garden snails.

However, the chickens later cough endlessly, sneeze, squeak, gape and die. Sometimes they gape and struggle to breathe before they die.

His concern was what could be the relationship between eating snails and the consequent fate of the chickens.

This enquiry took me many years back. I remembered as a small boy growing up on our farm in Murang’a that we had a lot of free-range chickens that were very tasty when well-cooked.

The chickens fed on snails, dung beetles, insects and earthworms in addition to plant matter. Frogs and toads were also on their menu.

Some of our chicken would develop the same condition Mbinji observed. My father believed that dead animals are toxic to humans and eating them was unreligious.

He would quickly slaughter the birds before they made their last kick and we enjoyed eating them. One thing he always insisted was the birds slaughtered because of sickness could only be cooked through boiling.

He believed the birds died of toxins from snails and beetles but those chemicals would be destroyed by boiling.

I only got to understand the mystery of the snails, the earthworms and the gaping chicken when Prof Maingi taught us parasitology in our second year at the university.

“Such chickens will show a symptomatology of open mouth breathing, gaping, difficulties in breathing and often death if not treated. The disease is not known to affect humans,” said the professor with a tone of finality.

I smiled as I took the notes, knowing that my dad’s generosity with sick chicken had not jeopardised our family health.
Gaping is the opening of the mouth continuously.

From Mbinji’s description, the symptomatology or group of symptoms observed highly indicate his mother’s chickens suffer from infestation with gape worms.

INFLAMMATION AT THE ATTCHMENT SITE

The worm is scientifically called Syngamus trachea and the disease is commonly called gapes.

The gape worm is a roundworm that affects wild birds, chickens and turkeys. It is transmitted mainly by snails, slugs, earthworms, and grasshoppers.

Other invertebrates like beetles may also transmit it. These are called the worm’s intermediate hosts. Gape worms can remain active as cysts in the muscles of the earthworm for up to three years.

Chickens mainly get infected by swallowing the larval stage of the worm carried in the intermediate host. The larva hatch in the chicken intestines, burrow into the body and migrate to the lungs where they settle for the rest of their life in the airways of the bronchi and trachea.

The worms live in permanent mating and form a characteristic Y shape visible without the use of instruments. This earns them the pseudonym, “the forked worm”.

The male worm is permanently attached in one location of the trachea and bronchi while the female detaches from time to time to select good feeding locations. The gape worm has a characteristic red colour and is thus also called the red tracheal worm.

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Once settled in the airways, the worms feed on mucous and blood and lay eggs that are coughed up and swallowed by the bird.

The eggs come out in the bird’s droppings and are eaten by the intermediate host such as an earthworm or snail. The larva of the worm hatch in the host, burrow into the muscles and form cysts awaiting consumption by the chickens to continue with the life cycle. It takes about 1-2 weeks after infection for the signs of gapes to start showing.

Gape worms in the airways cause direct blockage to breathing and the production of lots of mucous due to inflammation on the attachment site.

As the number of worms increase, the airways get clogged making it difficult for the bird to breathe. This is the cause of the coughing, gaping, gasping and head shaking seen in affected birds.

Worms migrating through the lungs may also cause severe pneumonia. The chickens in most cases suffocate and die.

Birds with fewer worms will show long-standing coughing, weight loss and poor growth. Young birds are more affected than the older ones.

Older birds may live with the worms without symptoms but keep contaminating the environment and infecting other birds. Turkeys are more resistant to the worms but when raised among chicken, can be the worm reservoir.

Gapes is diagnosed by clinical examination and confirmed by a postmortem. The doctor will find the Y-shaped red worms in the trachea and bronchi.

Examining the droppings of affected birds under the microscope may also show presence of the characteristic worm eggs.

Should you slaughter a chicken at home, always slit the trachea open down to the bronchi and see if there are red Y-shaped worms attached to the tracheal lining.

The common practice of rearing chicken in confinement has greatly reduced the occurrence of gape worm in poultry.

However, in chicken houses where wild birds and the intermediate hosts have access, gape worms may still be found in confined poultry.

There are a number of dewormers available for treatment of gape worm in its early stages before the physical blockage of the trachea and bronchi occurs.

Incidence of the disease in Kenya, however, appears low or under-reported. When writing this article, I only found one veterinarian who told me he had encountered the disease in Vihiga in 1990.

Should any farmer or reader come across the disease, they may contact me via email or mobile 0721386871. It would be interesting to know how widespread the problem is among free-range chickens in the country.



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PwC lauds ease of Customs tax

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PwC has commended the Kenya Revenue Authority (KRA) for lifting restrictions on warehousing of goods in Customs bonded warehouses, noting that the action will enhance the competitiveness of Kenya as a global and regional logistics hub.
PWC said the policy will also boost to businesses that utilise Customs bonded warehouses to store goods, defer payment of duties and are involved in regional trade. It however called for consistency in tax law.
“We expect that with Customs having lifted restrictions on warehousing of goods will help contribute to the State’s agenda of reviving the economy in light of the ravages of Covid-19, improve cash flow and stock management for businesses,” said Indirect Taxes Associate Director at PwC Kenya Maurice Mwaniki.
“We expect this will once again enhance the competitiveness of Kenya as a global and regional logistics hub and assist attract inward investment into Kenya.”

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Kenya Revenue Authority

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Kapsabet Boys are kings in Rift Valley in 2020 KCSE exam

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Kapsabet Boys had two candidates ranked among the top 15 students nationally in the 2020 KCSE exam. 

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KCSE giants

Female candidates

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Heavy rainfall could increase warns weatherman – KBC

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Over the weekend different areas across the country experienced heavy rainfall leading to flooding. In areas such as Ilchamus and Loboi (Baringo South) communities lost their cattle while in other locations (Nyando Sub County and Homabay)-homes were flooded.

The Kenya Meteorological Department has warned that the heavy rainfall being experienced in the country could increase in intensity to over 30-milimeters in 24 hours.

KBC Radio_KICD Timetable

In a statement, the Deputy Director of Meteorological Services Dr. David Gikungu said that the most affected areas are highlands west of the Rift Valley, the Lake Victoria basin, Highlands East of the Rift Valley including Nairobi county, the North Western region of Turkana County as well as the South Eastern Lowlands including Kajiado county.

Dr. Gikungu urged the public to be cautious as the high water levels in the rivers could result in flooding.

He warned that soils socked with water in hilly areas could trigger mudslides and urged the public to be cautious.

Get breaking news on your Mobile as-it-happens. SMS ‘NEWS’ to 20153

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Heavy Rainfall Advisory: Residents in all the mentioned areas are advised to be on the lookout for any eventuality.

This as Kilifi County Government Disaster Management Unit in conjunction with Kenya Red Cross Society has urged area residents living in low lying areas along River Sabaki to be alert over the possibility of flash floods.

The County Director of Meteorology, Ramadhan Munga said heavy rainfall had been forecast in the River Sabaki catchment areas hence floods may occur in the low lying areas that may not be receiving rainfall.

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